300 Norma Mag

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jonthompsXFirst Sergeant
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300 Norma Mag Load Data
10/14/2014
(1 vote)

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Wanted to get this back up on the new site:

There is lots of scattered handloading info for the 300NM but I haven't found a dedicated thread so I started one. Loads are organized by bullet weight. Anyone have a different load they really like? Here's what I've found so far:

Trim to: 2.4902" min 2.502" max

208 AMAX
87gr H1000
28” 1-9 Pac-Nor
3140fps

210gr Berger
89.5gr Ramshot magnum
27” 1-10 Rock Creek

210gr Berger
89 g. Retumbo
27" barrel
3130 fps

215gr Berger
92grs RL33
30” barrel
COAL 3.600”
3157 fps (90% case fill)

215gr Berger
89gr Retumbo
26” barrel
COAL 3.600”
3130fps

220gr SMK
92gr H-1000
26” Broughton 1-9
Fed 215GM
COAL 3.463
3003fps

220gr SMK
91gr N-570
30" Bartlein 1-10
Fed 215GM
3200fps

Berger 230gr
H1000 85.5 gr
27” 1-10 Krieger 5R
Velocity ???

Berger 230gr
Retumbo 87gr
27” 1-10 Krieger 5R
Velocity ???

Berger 230gr
H1000 80.7gr
30" 1-10" Lilja
Fed 215M
COAL 3.526"
Velocity ???

230gr Berger
89grs RL33
30” barrel
COAL 3.600”
3050 fps (90% case fill)

230gr Berger
86gr Retumbo
26” barrel
COAL 3.600”
3020fps

230gr Berger
88gr RL33
Barrel ???
COL 3.510
2907fps ES: 3.5

230gr Berger
86gr H50BMG
25.5” barrel
FED 215M
COAL 3.530”
2800fps ES: 3.6

230gr Berger
86gr N570
1-10 barrel
Fed 215M
3001fps

230 Berger
85.3gr Retumbo
26" barrel 1:9.5
WLRM primers
2940fps

240gr SMK
81.7gr H-1000
26” Broughton 1-9
Fed 215GM
COAL 3.436
2875fps

240gr SMK
H1000 81.7gr
Fed 215M
COAL 3.436”
Velocity ???

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mkollman74XFirst Sergeant
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Re: 300 Norma Mag Load Data
10/14/2014

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I am not in a position to contribute at this time, but I am a consumer of the info contained. With any luck I'll get my 300 Norma built, and be able to contribute in the coming months. The info RE: barrel length and twist is especially helpful. Bring on the additional data. Anyone running a relatively short barrel?
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260shooterXSergeant
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Re: 300 Norma Mag Load Data
11/28/2014

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I believe my 208 A-MAX load was the first one posted. But is a little off.
208 A-MAX
88.8 H-1000
Fed 215 Primer
OAL 3.490
3100 fps
ES 8
28" 1X9 Pac-Nor
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RedRangerRickXGunny Sergeant
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Re: 300 Norma Mag Load Data
01/11/2015

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Well I've scoured the section for 300RUM loads with 208s and had no luck. I wonder how close the NM loads would work?

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
01/18/2015 Last edited 07/30/2015 by jonthomps

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230gr Berger

H1000 82gr (*max load in my rifle*)

28" 1-10 barrel

Fed 215M

COAL 3.500"

3012fps

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
01/26/2015

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Reached out to Corey @ Berger Bullets. Here is the data he gave me for their 215gr pill:

215 Grain, PN: 30423 Bullet, CIP 3.680" COAL, 26" Barrel. 11/5/2014 RB
Bullet	Powder	Start Load In Grains	Approx. Start Velocity	Max. Load In Grains	Approx. Max. Velocity	Fill Ratio
215 Grain	Accurate Magpro	81.5	2795	86.0	2945	90%
215 Grain	Alliant RE-33	92.5	2838	97.3	3007	98%
215 Grain	Hodgdon H1000	83.5	2793	87.7	2932	98%
215 Grain	Norma 217	87.0	2823	91.6	2971	103%
215 Grain	Hodgdon Retumbo	87.0	2828	91.7	2974	101%
215 Grain	Viht. N570	88.0	2847	92.8	3018	98%

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
01/27/2015

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Here is Berger's data for either of their 230gr pills:

.300 Norma Magnum
230 Grain, PN: 30428 Bullet, CIP 3.680" COAL, 26" Barrel. 1/6/2015 RB
Bullet	Powder	Start Load In Grains	Approx. Start Velocity	Max. Load In Grains	Approx. Max. Velocity	Fill Ratio
230 Grain	Alliant RE 25	78.0	2695	82.3	2821	93%
230 Grain	Hodgdon Retumbo	84.5	2735	89.1	2874	100%
230 Grain	Hodgdon US 869	94.0	2669	99.2	2844	105%
230 Grain	Hodgdon H50BMG	90.0	2682	94.7	2848	105%
230 Grain	Alliant RE 50	93.5	2736	98.6	2913	103%

.300 Norma Magnum
230 Grain, PN: 30110 Bullet, 3.680" COAL, 26" Barrel. 4/7/2014 RB
Bullet	Powder	Start Load In Grains	Approx. Start Velocity	Max. Load In Grains	Approx. Max. Velocity	Fill Ratio
230 Grain	Ramshot Magnum	80.5	2626	84.5	2749	87%
230 Grain	H-1000	80.0	2654	84.1	2786	95%
230 Grain	VIHT N570	79.0	2533	88.1	2850	94%
230 Grain	RE-33	88.5	2704	93.2	2865	96%

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lapua50XPrivate
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Re: 300 Norma Mag Load Data
02/24/2015

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Hi there guys



i loaded up 230 berg in my 300 NM with H1000 84.1 got av 2900 fps very tight group at 100m



though using NORMA brass using 215 Feds I noticed after 1 and 2 firings 2 of the relaoded brass the 215 where loose .



set my die FL sizing die to match as close as possible the gun chamber is it the brass pressures are good fr this load any ideas anyone ?

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MonstaPuggernautXPrivate
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Re: 300 Norma Mag Load Data
03/16/2015

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Yahtzee. I'm glad I found this thread.

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
03/21/2015

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Out shooting this AM. Great load that shot in the .3's, but it's pretty hot:

Norma brass

215gr Berger hybrid

90gr N570

FGMM 215 primer

3185fps average over 5 shots w/ slight ejector marks from a 28" Bartlein med palma.



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grunklXPrivate
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Re: 300 Norma Mag Load Data
04/05/2015

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I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.

My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.

Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?

The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!

Grunkl

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
04/07/2015

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grunkl wrote:​

I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.​

​

My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.​

​

Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?​

​

The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!​

​

Grunkl​

Without running the thread off topic too much, I'd say go with Defiance Deviant action. Word to the wise: Nosler is a little overly enthusiastic about the Accubond LR bullet BC's. Do a Google search regarding the accuracy of their advertised BC's. Litz published some info on it.

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Idahohorseman

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Re: 300 Norma Mag Load Data
04/08/2015

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jonthomps wrote:​

grunkl wrote:​

I've been looking for a cartridge to use in a long-range target (maybe hunting?) rig I aim to have built, and the 300NM has to be it; good compromise of power, and efficiency.​

​

My hope is to run Nosler's new 210grain LR Accubond projectiles, slick little buggers, with an incredible G7 BC (.366) as an alternative to the Bergers.​

​

Any suggestions for an action? I'm considering Defiance Machine, or the Mauserfield?​

​

The load data you've listed corresponds damn closely with my calculations. Great resource blokes!!!​

​

Grunkl​

Without running the thread off topic too much, I'd say go with Defiance Deviant action. Word to the wise: Nosler is a little overly enthusiastic about the Accubond LR bullet BC's. Do a Google search regarding the accuracy of their advertised BC's. Litz published some info on it.​

​

Yesterday, I finished up developing the lo0ad for my BAT Machine actioned long range hunter 300 NM. Wicked accurate and easy to find a load.... Berger 230, Retumbo 86 gr., FGM magnum, 2973 fps out of a 24" suppressed Broughton.... hole in hole accurate at 100M. tomorrow I will stretch it out to a thousand. I am confident it will do well.​

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nnnn16XCorporal
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Re: 300 Norma Mag Load Data
04/26/2015

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230 Berger OTM .719

85.4 of H1000

Norma Brass

Fed nonmatch primers

22" barrel

last 100 yd string was 2867, 2867, 2867, 2853, 2862 and they were all in 1 hole

This rifle has been amazing. Consistent 1000yd groups between 5 and 6 inches. I finally found a spot to shoot the mile (1762) and when we finally went the wind was wildly inconsistent but I had 1 of 13 on target. There was zero splash visible so I'm certain it'll be better next time. I'll take one at a mile considering this rifle represents my first try at long range, first try at reloading, first try at cutting a chamber and building a rifle, first try at a bolt gun actually.

I have had a problem with the brass. About one of every 3 cases won't rechamber in the rifle. They will but I have to really fight to get the bolt closed. Any tips or logic that someone could provide would be extremely helpful.



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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
04/27/2015

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It seems like brass life is a common complaint of the 300NM. Speed costs. I'm pushing mine pretty hard and it looks like 3 reloads is all she's gonna give me. If Lapua came with brass (or if someone else like RWS made some tough brass) we'd all be in heaven.

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ugsly308XSergeant
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Re: 300 Norma Mag Load Data
06/19/2015

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nnnn16, have you tried bumping the shoulder back just a tad? I run mine thru a redding body die and havent had any problems with it. Dont force it, you'll end up galling your lugs. You want them to chamber like butter.

Casey
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rowen99XSergeant
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Re: 300 Norma Mag Load Data
07/10/2015

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83.0 grains of Retumbo
Fed 215M
230 Berger
10Twist
26"
2897 FPS
Verified at 1287 yards

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
07/23/2015

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88.0gr N570 & 215FGMM
3.600" OAL
215 Berger hybrid
1-10" twist
28" barrel
3150fps avg

What a hammer! No pressure signs and extremely accurate. Shot several sub 1" groups at 356y.

[IMG2=JSON]{"alt":" photo 1719CB23-5A76-422E-AB69-8F9C9656D329_zpsjbe6onib.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/1719CB23-5A76-422E-AB69-8F9C9656D329_zpsjbe6onib.jpg"}[/IMG2]

 

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[IMG2=JSON]{"alt":" photo FC5789AF-0E34-48E3-9BBE-939274422A74_zpsodxdpzxz.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/FC5789AF-0E34-48E3-9BBE-939274422A74_zpsodxdpzxz.jpg"}[/IMG2] [IMG2=JSON]{"alt":" photo 588C45FA-87EC-4D48-92A4-FC972AFF9A75_zpsgxvn9dkf.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/588C45FA-87EC-4D48-92A4-FC972AFF9A75_zpsgxvn9dkf.jpg"}[/IMG2]

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5lingshotXPrivate
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Re: 300 Norma Mag Load Data
08/05/2015

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Wondering if anyone else had an opinion on the brass life for the Norma Mag thus far?

I am working thru my first 100 pieces of brass, have only shot a little under 60 rounds right now. Haven't driven the brass hard yet, at 87 gr RL33 and waiting for my chrono to come back from repair to see what my guns shooting at.

I haven't been able to source Fed 215s around here in So Cal lately so I've been using WLRM. Most curious about the primer pockets. Making me nervous to hear that primer pockets were loosening after 2-3 firings.

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
10/17/2015

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Berger 230gr Hybrid

83.5 H1000

F215M

Norma Brass

2.8470 @ ogive, 3.600 COAL and 0.010 off the lands

2890fps from a 27.25" Bartlein 1-8 twist

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BOBLEESWAGGER338XSergeant
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Re: 300 Norma Mag Load Data
11/02/2015

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Ok fellas got both h1000 and retumbo have plenty of both I'm going to b using a 230 berger hybrid I have been doing sum load work up with h1000 I'm at 80.2 grains seems to b a little hot primers r cratering alittle I'm right a 2915 fps is retube going to yield more velocity

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
01/15/2016

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I have read that the 300NM is hard on brass. What exactly is failing? Are the necks splitting or the primer pockets getting too loose to hold primers?



Thanks,



CJ97

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
01/25/2016
(1 vote)

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cavjock97 wrote:
I have read that the 300NM is hard on brass. What exactly is failing? Are the necks splitting or the primer pockets getting too loose to hold primers?



Thanks,



CJ97​

Primer pockets getting too loose.

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
01/26/2016
(1 vote)

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Thanks. I just got 100 pieces of brass from Midway. Those were the tightest primer pockets I have ever encountered. 215Ms required a lot of pressure to seat. We'll see how long they last.

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RaufossXSergeant
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Re: 300 Norma Mag Load Data
02/11/2016

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Run cci 250 or even better Tula large Magnum.

I dont have any premature loose primer pocket with those.

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
02/12/2016

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Raufoss wrote:
Run cci 250 or even better Tula large Magnum.

I dont have any premature loose primer pocket with those.​

Thanks! I'll give those a try. I've got a metric ton of both. I'm wondering if Norma has changed the brass to address the loose primer pockets that seem to plague this round?



-CJ97

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GhengisAhn175XFirst Sergeant
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Re: 300 Norma Mag Load Data
04/16/2016

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Not to derail but two suggestions...

1. When posting handload data, please list all aspects:
   bullet, primer, powder, brass
   jump to lands, COAL
   ES, SD, avg FPS
2. i am testing a primer pocket tightening tool along with another SH member. will post results in the reloading section soon...I think the NM crowd can benefit from it, provided you guys aren't also seeing signs of case head separation or cracking necks

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
04/25/2016

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Meet the newest addition to the family, Louise. Picked her up from GAP today. These are shots 4, 5, & 6 at 102y. I shot a nice 1" 3-shot group at 356y for the final group of the evening. Load: 230gr Berger hybrid, 88gr H50BMG, 2.847" to ogive. I've done zero load work so needless to say, I'm really looking forward to getting her dialed in! Rifle specs:

Surgeon XL
KMW stock in McM camo
Bartlein 1-9 twist finished at 27"
Badger FTE brake
Finished in FDE cerakote



[IMG2=JSON]{"alt":" photo IMG_1040_zpsvzmscwgu.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/IMG_1040_zpsvzmscwgu.jpg"}[/IMG2] [IMG2=JSON]{"alt":" photo IMG_1042_zpsmdn4gw6e.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/IMG_1042_zpsmdn4gw6e.jpg"}[/IMG2]

 

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
04/26/2016

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jonthomps wrote:
Meet the newest addition to the family, Louise. Picked her up from GAP today. These are shots 4, 5, & 6 at 102y. I shot a nice 1" 3-shot group at 356y for the final group of the evening. Load: 230gr Berger hybrid, 88gr H50BMG, 2.847" to ogive. I've done zero load work so needless to say, I'm really looking forward to getting her dialed in! Rifle specs:

Surgeon XL
KMW stock in McM camo
Bartlein 1-9 twist finished at 27"
Badger FTE brake
Finished in FDE cerakote



[IMG2=JSON]{"alt":" photo IMG_1040_zpsvzmscwgu.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/IMG_1040_zpsvzmscwgu.jpg"}[/IMG2] [IMG2=JSON]{"alt":" photo IMG_1042_zpsmdn4gw6e.jpg","data-align":"none","data-size":"full","src":"http:\/\/i1064.photobucket.com\/albums\/u373\/jonthomps\/IMG_1042_zpsmdn4gw6e.jpg"}[/IMG2]​

That is really pretty! Glad to see you're back in the NM game. I'd love to hear what kind of velocity you are getting with the 50 BMG. I am using Retumbo right now and would like to see if I could get a little more speed.



CJ97

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
04/26/2016

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Thanks CJ97. I haven't chrono'd that load yet - didn't have time. I'm expecting it to be in the 2875-2900 range. There were no pressure signs so I'm moving up to 89gr and 90gr. I'll post velocities to this thread when I have a chance to get out and shoot again.

 

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amaxjackXPrivate
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Re: 300 Norma Mag Load Data
04/29/2016
(1 vote)

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I bet 2750. It is too slow for this case. RL 33 is the powder for the 300 Norma

Jack

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
04/30/2016 Last edited 04/30/2016 by jonthomps

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Got a chance to get out shooting this afternoon and chrono the following load:
Berger 230gr hybrid
88gr H50BMG
2.847" @ ogive
2896 fps average over 5 shots
SD: 5.0
3/4" 3-shot group @ 356y

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WindGypsyXSergeant
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Re: 300 Norma Mag Load Data
05/01/2016

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Got the first 35 rds through my 300 NM this weekend, thinking it's going to be a real peach.

27" hawk hill 9 twist in a DTA.
230 berger hybrid target
3.660 coal (jumping roughly .020")
Virgin brass
Retumbo
F215 primer

Did a quick ladder from 83-87 grains in 1 grain increments to start. Primers were flattening at 86, cratering and leaving light ejector marks at 87. Shot a 3 shot group of all charges 85 and 86 were best. 87 was indicating speeds around 2990 on prochrono (which has been spotty lately).

Went back today with 85.3, 85.9, 86.5. Only clocked 2 of the 85.3 rounds @ 2956, 2952 on the magnetospeed.

Tightest 3 shot group charge was 86.5 @ .266", others werent terrible either. I'm guessing this is around 2980 fps.

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
05/02/2016

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I spent the weekend with two new 300 Norma Mags. Both rifles were built by Omar Alonzo of Alonzo Custom Rifles in Houston. One rifle is a complete build with a 28" 1:9 Broughton on a BAT Tactical Action. Barreled action is sitting in a Manners T-4A with Jewel Trigger set at about a pound. This is my Dad's rifle and is the third that he has had Omar build in the last year. Each one has been a laser beam.



The second rifle is my AX338 that I had Omar re-barrel with a 26" Broughton. I have done some preliminary load development with this rifle and had 50 rounds loaded with 84 grains of Retumbo under pointed 230 Hybrids. With only 25 rounds on the barrel, the Magnetospeed clocked this load at 2890 FPS. This is near max in my rifle, as 86 grains resulted in cratered primers, heavy ejector swipe and heavy bolt lift.



My dad brought his rifle and 100 rounds that the smith loaded for him. The load is 89 grains of RL 33 and the 230 Berger. Both of us used virgin Norma brass and 215M primers.



Saturday morning I mounted one of my scopes on the BAT and took both rifles out to zero and run them over the Magnetospeed. The 28" Broughton barrel printed an average of 2921 with an SD of 25. Not great, but the barrel had less than 10 rounds on it and had just been cleaned. I already had velocity data on my AX with the Retumbo load, so I shot a few of the RL 33 rounds and got 2901 with an SD of 15. I brought a piece of AR500 with me so I went ahead and set it up and backed up to the 1000 yard line. The first 3 shots with the BAT were just below the center of the 15" circle in a 3.5 inch group. Not Bad! From there I went to 1500 yards. It took 3 shots to get on target, but by then I was out of time, so I recorded the dope and headed back to the house.



Late Sunday afternoon my dad and I headed out to the range. We started at the 1000 yard line with my dad shooting off the bench and me laying in the dirt. Hits at 1000 were no problem on the 15" circle. With both rifles we were having to come down on the elevation numbers we were getting from my iPhone Shooter app. It was only a couple of clicks at 1000, but it was half a mil at 1500 and .7 at 1787 yards. The BAT really shined at a mile. Two shots to get on target and then 3 hits in a row before the wind blew me off the left side of the 24"X24" plate. My dad hit it couple of times as well. I tried with the AX, but it was almost dark by then and we couldn't see any splash at all.



It was a really fun afternoon, all in all. We were super lucky with the weather... cloudy with a 3 o'clock breeze that never got over 9 MPH. There was never any mirage to speak of, so you could easily spot hits on steel out to a mile. As of now, I am shooting my AX wit the Crux 7.5 ARK338 suppressor. It does a nice job on the sound, but boy do you pay for it in the recoil department. It's not terrible, but after shooting the BAT with a badger brake, it seems pretty bad. I will keep shooting it this way for a while , but I may end up ditching the can and getting a good brake. I'm definitely going to pick up some RL 33 to try out. At the end of the day, when I trued up the velocity in shooter, it looks like the 28" barrel had gained almost 100 FPS (3016) since the first rounds shot over the Magnetospeed. That tells me I can reasonably expect 2950 out of the 26" barrel. We'll see if that works out. Both barrels have almost 100 rounds on them now, so I will do another OCW test and re-check velocity. After that, I plan on just shooting the snot out of them. This is a really fun cartridge!



Here are the load Specs for each rifle:



26" 1:9 Broughton

230 Berger Hybrid-pointed

84 gr. Retumbo

Virgin Norma case- Chamfer and debur W/Giraud trimmer

215M

3.710 COAL

2900 FPS



28" 1:9 Broughton

230 Berger Hybrid

89 gr. RL-33

Virgin Norma Case

215M

3.605 COAL

3016 FPS





Thanks,



CJ97





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ChandalarXSergeant
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Re: 300 Norma Mag Load Data
05/09/2016

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This is for a hunting load, 20" Bartlein 5r barrel,

Barnes 200 LRX, .070 off the lands, H1000 @ 84grains, Federal 215 mag primer

2943FPS

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300NORMAXPrivate
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Re: 300 Norma Mag Load Data
05/20/2016

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Hi there 175



how did you go ? I have the same issue bought some cci 250 have not fire HL off as yet but and use clear nail varnish to lock them in and stop them from falling out under recoil. Anyone else has this issue please let us know.Norma need to make harder brass full stop.

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WindGypsyXSergeant
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Re: 300 Norma Mag Load Data
06/20/2016

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Struggling with load ADD as usual for my 27" 9 twist DTA. Top end loads that are shooting well right now, all at 3.650 COAL with 230 target hybrids (.015 jump) and fed 215s:
92.0 gr rl33 : 3030 fps avg - most consistent velocities
95.5 h50bmg: 2930 fps avg
85.0 retumbo: 2980 fps avg

Shot the 92.0 rl33 in 90 degree heat yesterday, extraction was a little sticky and primers were cratering worse than usual. Also shot 3 that spent the night in the freezer and were kept on ice until 30 secs before pulling the trigger - avg 3010 fps.

I'll prob end up sticking with h50bmg or retumbo for steel shooting.

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
06/21/2016

---

WindGypsy wrote:
Struggling with load ADD as usual for my 27" 9 twist DTA. Top end loads that are shooting well right now, all at 3.650 COAL with 230 target hybrids (.015 jump) and fed 215s:
92.0 gr rl33 : 3030 fps avg - most consistent velocities
95.5 h50bmg: 2930 fps avg
85.0 retumbo: 2980 fps avg

Shot the 92.0 rl33 in 90 degree heat yesterday, extraction was a little sticky and primers were cratering worse than usual. Also shot 3 that spent the night in the freezer and were kept on ice until 30 secs before pulling the trigger - avg 3010 fps.

I'll prob end up sticking with h50bmg or retumbo for steel shooting.​

I think there may be a node with a lower charge of the RL33 that will still give you higher velocities than your 50BMG load. Have you run an OCW or ladder with lower charge weights?

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WindGypsyXSergeant
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Re: 300 Norma Mag Load Data
06/22/2016

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cavjock97 wrote:

WindGypsy wrote:

Struggling with load ADD as usual for my 27" 9 twist DTA. Top end loads that are shooting well right now, all at 3.650 COAL with 230 target hybrids (.015 jump) and fed 215s:
92.0 gr rl33 : 3030 fps avg - most consistent velocities
95.5 h50bmg: 2930 fps avg
85.0 retumbo: 2980 fps avg

Shot the 92.0 rl33 in 90 degree heat yesterday, extraction was a little sticky and primers were cratering worse than usual. Also shot 3 that spent the night in the freezer and were kept on ice until 30 secs before pulling the trigger - avg 3010 fps.

I'll prob end up sticking with h50bmg or retumbo for steel shooting.​

I think there may be a node with a lower charge of the RL33 that will still give you higher velocities than your 50BMG load. Have you run an OCW or ladder with lower charge weights?​

Not very formally. I shot 3 shot groups in one grain increments from 88.0 to 92.0. It drops off to mid 2900s pretty quick.

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
07/12/2016

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Load data per another member (lapua50):

Powder Retumbo
Bullet 215 berger
Primer CCI 250
New Case Norma sized using whidden FL bushing die
Primer pockets all uniform and flash hole re cut
Charge 87.5 gn
Fps 2983
SD 16
10 shot fired range 100 yards
Results was 3/4" group
Barrel 26" 1:9 MADCO Moly chrome
Action Stiller
Stock Manners T4A

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poison123XFirst Sergeant
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Re: 300 Norma Mag Load Data
07/18/2016

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N570
215 Berger
215m
New or 1x Resized Norma Case
88.6 gn
FPS 3160
SD 7
5 shot group @ 500y = 2.5x"
27" Bartlein
Badger 2013

Sentinel

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bjay20XFirst Sergeant
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Re: 300 Norma Mag Load Data
07/30/2016

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Do you know the oal o give with load

jonthomps wrote:

Load data per another member (lapua50):

Powder Retumbo
Bullet 215 berger
Primer CCI 250
New Case Norma sized using whidden FL bushing die
Primer pockets all uniform and flash hole re cut
Charge 87.5 gn
Fps 2983
SD 16
10 shot fired range 100 yards
Results was 3/4" group
Barrel 26" 1:9 MADCO Moly chrome
Action Stiller
Stock Manners T4A​

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
08/04/2016

---

bjay20 wrote:
Do you know the oal o give with load

jonthomps wrote:

Load data per another member (lapua50):

Powder Retumbo
Bullet 215 berger
Primer CCI 250
New Case Norma sized using whidden FL bushing die
Primer pockets all uniform and flash hole re cut
Charge 87.5 gn
Fps 2983
SD 16
10 shot fired range 100 yards
Results was 3/4" group
Barrel 26" 1:9 MADCO Moly chrome
Action Stiller
Stock Manners T4A​

I don't. Not my load.

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RinkystinkoX60 MONTHS
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Re: 300 Norma Mag Load Data
08/09/2016

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Here's my load:
LRI built,
24" bartlein heavy palma 8twist
84.0gr H1000, light ejector swipe
Cci 250s, virgin norma brass
230 berger hybrids @ 2850fps SD ~ 15.0
Seated .010 off the lands.

The groups seem to hover around 1/2". Every round through this rifle has been through a tbac ultra 9. After the first or second shot the mirage gets heavy at times and I think it's my position that affects groups mostly. First 3rds of 84gr went into a 3/10" group. Usually about 3" groups at 500-550yds.

Ironically about 20rds later the same load printed a 3.15" group at 1012yds.

That said I just bought 16lbs of retumbo. Wanting a bit more speed. And this load isn't bad either.

That said, what kind of groups should I be expecting? I have an elite iron mirage cover in the mailbox. I'm really hoping for 2925 and sub half minute groups with retumbo. But we'll see in a few weeks...

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RooksyXSergeant
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Re: 300 Norma Mag Load Data
08/19/2016

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Rekindling this area. Seeing a lot of info on the 230's. Any more powders with the 215's? Are you guys finding N570 and H1000 to be very dirty? Looking to try RL33, Retumbo, IMR 7977, and maybe some 50BMG.

Pick the rifle up next week. 26", 1-10"



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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
09/01/2016

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Rooksy wrote:
Rekindling this area. Seeing a lot of info on the 230's. Any more powders with the 215's? Are you guys finding N570 and H1000 to be very dirty? Looking to try RL33, Retumbo, IMR 7977, and maybe some 50BMG.

Pick the rifle up next week. 26", 1-10"

​

Retumbo, H1000 and RL33 should all be good choices for the 215's. I've gotten the lowest SD's with H50BMG/230 combo but you may give up 50-75 fps compared to other powders. N570 gave me great results wit hthe 215's - 3150fps from a 28" barrel, 3/4" groups at 356y - but it's pretty dirty.

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SeandradamusXGunny Sergeant
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Re: 300 Norma Mag Load Data
09/03/2016 Last edited 09/03/2016 by Seandradamus

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I've been using both h1000 and retumbo with the 215s
Mine is a 22" barrel , very forgiving on loads, .5 grain differences still poi. I use 87.6 retumbo 2.8 lto Tula mag primer. SDs around 4or 5 , also shoot 86.4 h1000 both loads are run in the 2990s. .25 moa for both .Loving the 300 Norma.
As a side note my fired brass is tight right at the mouth when trying to push a bullet through, once past the mouth it slips through. I think it may be causing a bit of overpressure. Any ideas?

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110len

XSergeant
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Re: 300 Norma Mag Load Data
09/21/2016
(1 vote)

---

Load data using Warner Tool Flatline 198gr. bullets



OAL 3.765

VVN570 89grs

Rock Creek 1:8 27in.

Norma brass

Fed GMM mag rifle primers

3150 fps

5.3 mils @1000 yds





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110len

XSergeant
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Re: 300 Norma Mag Load Data
09/21/2016

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Load data with 230gr Berger OTM



OAL 3.600

Norma 217 86.7grs

Rock Creek 1:8 26in

Norma brass

Fed GMM mag rifle

2960fps

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
09/24/2016

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Thank you Bryan! Not a reload, but it's nice to see another manufacturer get into the 300NM game:

http://www.buyabmammo.com/300-norma-mag.html

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
10/02/2016 Last edited 10/07/2016 by jonthomps

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Awesome load that's pretty easy on brass. I chrono'ed 10 shots:

230gr Berger match hybrid

88.0gr RE-33

2.837" at ogive

SD: 7.9

2950fps

1.25" 4-shot group at 403y.

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ratrod54X45 MONTHS
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Re: 300 Norma Mag Load Data
11/23/2016 Last edited 11/23/2016 by ratrod54

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I am amazed at the differences in the RE-33 powder and the load data on here. I asked Berger for their reload table for the 230 Hybrids, since it is not in my reloading manual, and was a little surprised at the information. They show slower velocities at similar charges than the majority on here using the re-33 and 230's. (Included the table for anyone interested - NOTE: This is Bergers information sent to me by Bob Blaine)

Got bored and tried to match the table they sent to me with the ones in the manual.

I did a ladder test on Monday with 7 loads, starting at 87 grains and going up to 90. I had hoped to see the 2900 mark relatively quick and was concerned about what might happen past 90 grains. That didn't happen. I get it that one rifle is not like the next; however, there are quite a few that have found 2900+ at 88 or 89 grains. I wouldn't think there was a chance there could be up to 300 fps difference.

Specs:
26" 1:9 Bartlein Barrel
Berger 230 Hybrids
Norma Brass
215M primer
RE-33 powder
Used a Lab Radar for velocity

I am not the best shot by any means. I had 1.5" groups at 200 yards. Lots with potential (4 shots inside an inch then ruining the group with horizontal spread due to my inability to shoot) but I am not a seasoned shooter so I have my errors.

I think series 7 would have had better results but I forgot to arm the Labradar. It was the best group of the day.

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fenixmikeXGunny Sergeant
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Re: 300 Norma Mag Load Data
11/23/2016 Last edited 11/25/2016 by fenixmike

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Has anyone tried the Hornady ELD bullets with any luck yet? I was looking at the ELD 208 and 225 gr bullets. My Barrett MRAD should be here in a month or so and collecting supplies to start loading.

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RthurDXFirst Sergeant
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Re: 300 Norma Mag Load Data
12/11/2016

---

110len wrote:
Load data using Warner Tool Flatline 198gr. bullets



OAL 3.765

VVN570 89grs

Rock Creek 1:8 27in.

Norma brass

Fed GMM mag rifle primers

3150 fps

5.3 mils @1000 yds



​

Have you had the chance to take this load to a mile and beyond?

Considering this bullet/cal for an ELR build.



R



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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
12/12/2016

---

ratrod54 wrote:
I am amazed at the differences in the RE-33 powder and the load data on here. I asked Berger for their reload table for the 230 Hybrids, since it is not in my reloading manual, and was a little surprised at the information. They show slower velocities at similar charges than the majority on here using the re-33 and 230's. (Included the table for anyone interested - NOTE: This is Bergers information sent to me by Bob Blaine)

Got bored and tried to match the table they sent to me with the ones in the manual.

I did a ladder test on Monday with 7 loads, starting at 87 grains and going up to 90. I had hoped to see the 2900 mark relatively quick and was concerned about what might happen past 90 grains. That didn't happen. I get it that one rifle is not like the next; however, there are quite a few that have found 2900+ at 88 or 89 grains. I wouldn't think there was a chance there could be up to 300 fps difference.

Specs:
26" 1:9 Bartlein Barrel
Berger 230 Hybrids
Norma Brass
215M primer
RE-33 powder
Used a Lab Radar for velocity

I am not the best shot by any means. I had 1.5" groups at 200 yards. Lots with potential (4 shots inside an inch then ruining the group with horizontal spread due to my inability to shoot) but I am not a seasoned shooter so I have my errors.

I think series 7 would have had better results but I forgot to arm the Labradar. It was the best group of the day.



Berger's Data makes no sense. 94 grains of RL33 under a 230 in my rifle would lock the bolt and probably pierce a primer. 84 grains of Retumbo is also near max for me. The speed numbers they have are also super low. I get 2950 with 89 grains of RL33 and the 230 and 2900 with 84 grains of Retumbo.​

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wacknstackXPrivate
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Re: 300 Norma Mag Load Data
12/13/2016

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1:9 brux 26''

230gr berger hybrid match

85gr h 1000

cci 250 primer

.0010 off

sd: 5

2940 avg velocity

coal 3.580

smallest group of .169

once fired brass bumped .003, .001 neck tension

 

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ratrod54X45 MONTHS
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Re: 300 Norma Mag Load Data
12/22/2016 Last edited 12/23/2016 by ratrod54

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cavjock97 wrote:
Berger's Data makes no sense. 94 grains of RL33 under a 230 in my rifle would lock the bolt and probably pierce a primer. 84 grains of Retumbo is also near max for me. The speed numbers they have are also super low. I get 2950 with 89 grains of RL33 and the 230 and 2900 with 84 grains of Retumbo.​

I agree with you. That was the first thing I said after getting the tables. I had a conversation with them regarding their velocities and starting load data as compared to this post and other info I've seen. I wasn't happy with the answer I got so I started at 87 grains. As you can see, at 90 I'm at 2,870. They show 90gr at 2,755 or so. I had no pressure signs so I'm going to go up by 1/2 grain (starting at 90.5) for 7 more loads and see how it goes. I'll report back.

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LSUfreak2X108 MONTHS
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Re: 300 Norma Mag Load Data
12/26/2016

---

110len wrote:
Load data using Warner Tool Flatline 198gr. bullets



OAL 3.765

VVN570 89grs

Rock Creek 1:8 27in.

Norma brass

Fed GMM mag rifle primers

3150 fps

5.3 mils @1000 yds



​

5.3 at 1k? Damn son..

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EAS30

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Re: 300 Norma Mag Load Data
12/29/2016 Last edited 12/29/2016 by EAS30

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212gr ELDX
94gr RL33
WLRM
28" proof carbon barrel
OAL 3.600
3220 fps

I found my happy load with rl33. I'm on load 4 with my brass and they are looking beautiful. Made 15 out of 15 shots today at 1000 yards on 10" steel.

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
12/29/2016

---

EAS30 wrote:
212gr ELDX
94gr RL33
WLRM
28" proof carbon barrel
OAL 3.600
3220 fps

I found my happy load with rl33. I'm on load 4 with my brass and they are looking beautiful. Made 15 out of 15 shots today at 1000 yards on 10" steel.​

My God that's fast... and a shit ton of RL33. That has to be a compressed load, no?

 

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EAS30

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Re: 300 Norma Mag Load Data
12/29/2016

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No, not compressed. I'm guessing it's about 92% fill. During my work up loads I ran a few 96 and 97 gr loads pushing close to 3380fps. The bolt got mildly sticky and I started seeing full moons on the brass. my rifle seems to like the 93-94 gr loads. I'm seeing less then a qtr moon with 94gr. It is a ton of powder, 1 lb loads 75 rounds so it goes fast.

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PainFullXSergeant
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Re: 300 Norma Mag Load Data
01/01/2017
(1 vote)

---

TAG!

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jonthompsXFirst Sergeant
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Re: 300 Norma Mag Load Data
01/03/2017

---

EAS30 wrote:
212gr ELDX
94gr RL33
WLRM
28" proof carbon barrel
OAL 3.600
3220 fps

I found my happy load with rl33. I'm on load 4 with my brass and they are looking beautiful. Made 15 out of 15 shots today at 1000 yards on 10" steel.​

That's a wicked load! What's your twist?

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
01/03/2017 Last edited 01/03/2017 by cavjock97

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Anybody having any pressure issues with RL33? I'm just trying to narrow down what might be happening with my gun. 89 grains of RL33 under a 230 Hybrid is giving heavy ejector swipes, a lot of primer flow and a really heavy bolt. Not sure what is going on.

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CplSnafu

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Re: 300 Norma Mag Load Data
01/04/2017

---

Brass back in stock at midway, and on-sale. $2.00 each

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ratrod54X45 MONTHS
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Re: 300 Norma Mag Load Data
01/06/2017 Last edited 01/09/2017 by ratrod54

---

cavjock97 wrote:

Anybody having any pressure issues with RL33? I'm just trying to narrow down what might be happening with my gun. 89 grains of RL33 under a 230 Hybrid is giving heavy ejector swipes, a lot of primer flow and a really heavy bolt. Not sure what is going on.​

No issue yet. I plan on shooting a ladder test with 7 loads from 90-93 grains. 90 grains gave me no pressure and ~2800fps. I want more velocity.

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ratrod54X45 MONTHS
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Re: 300 Norma Mag Load Data
01/09/2017

---

Today's test turned up light pressure at 92.5 and 93 the bolt lift is heavy. 93 produced 3050fps but that load is to hot for my rifle. 91 and 92 grains both grouped well and 92 is @ ~2960.

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cavjock97X77 MONTHS
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Re: 300 Norma Mag Load Data
01/09/2017

---

ratrod54 wrote:
Today's test turned up light pressure at 92.5 and 93 the bolt lift is heavy. 93 produced 3050fps but that load is to hot for my rifle. 91 and 92 grains both grouped well and 92 is @ ~2960.​

Hmmm. How long is your barrel? I am getting 2970 with 89 grains in a 26" Broughton. This is with a 230?

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ratrod54X45 MONTHS
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Re: 300 Norma Mag Load Data
01/10/2017

---

cavjock97 wrote:

ratrod54 wrote:

Today's test turned up light pressure at 92.5 and 93 the bolt lift is heavy. 93 produced 3050fps but that load is to hot for my rifle. 91 and 92 grains both grouped well and 92 is @ ~2960.​

Hmmm. How long is your barrel? I am getting 2970 with 89 grains in a 26" Broughton. This is with a 230?​

Yep, with a Berger 230 and 92 grains of Reloader 33 from a 26" Bartlein 9 twist barrel. Norma brass and Ferderal 215's (not 215M's). OAL is 3.672 with .020 jump.

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JCR99XPrivate
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Re: 300 Norma Mag Load Data
Wednesday at 6:00 AM

---

Great thread. Thanks. All of this load data is going to be very helpful.

I am looking at the Christensen Arms BA Tactical 300 NM. Any thoughts?

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JCR99XPrivate
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Re: 300 Norma Mag Load Data
Yesterday at 8:33 AM

---

I am looking at the Christensen Arms BA Tactical 300 NM. Any thoughts?

 

[Birddog6424]

Anyone had a chance to try out the new Hornady 225gr ELD-M?

Hornady has published BC's of .777 G1 and .391 G7. Higher than the Berger Hybrid. It's a 1.655 OAL.

Their BC's have been pretty accurate on these new bullets so far in the other sizes I have tried.

 

[Simia Dei]

Anyone had a chance to try out the new Hornady 225gr ELD-M?

Hornady has published BC's of .777 G1 and .391 G7. Higher than the Berger Hybrid. It's a 1.655 OAL.

Their BC's have been pretty accurate on these new bullets so far in the other sizes I have tried.

I just bought a few boxes so will hopefully have some data soon.

 

[calshipbuilder]

215 Hybrid
BR2 Primer
Norma cases
Retumbo

COAL	Charge	Group	SD	Velocity
3.64	90	0.6	8	3170
3.51	87	1.3	14	3046
3.66	86.5	0.8	9.9	3077
3.66	88	1	5	3110
3.66	87.5	0.8	9.7	3106

 

[surgeon260]

Anybody have a clue what is up with Berger's load data for the 230s? They list a max load of 89.1 grains of Retumbo, but it sounds like no one is getting close to that without major pressure signs. It seems like most people are running 84-87 grains of Retumbo. What gives?

 

[jfields]

Anybody have a clue what is up with Berger's load data for the 230s? They list a max load of 89.1 grains of Retumbo, but it sounds like no one is getting close to that without major pressure signs. It seems like most people are running 84-87 grains of Retumbo. What gives?

That Berger Data is messed up. I would totally disregard.

-CJ97

 

[surgeon260]

Thanks for confirming my suspicion. It is pretty surprising to see Berger miss the mark like that. Their data has been spot on for me in the past.

 

[GoldenFinger]

Anyone finding this brass sucks??? Virgin brass runs fine but after resizing and measuring I'm finding it is growing on me like crazy and primer pockets are getting very soft after 2-3 firings. I'm using Whidden dies and headspace gauge. I want to contact NORMA USA but I am unable to find a phone number.

Retumbo speed test with 215's. 3.600 O.A.L
85.6-2990
85.8-3019
86- 3031

86.2-3049
86.4-3053 > I'm going to explore this node. I think there might be one up higher but the way this brass is holding up, I don't know if its worth it.
86.6-3059

86.8-3085
87- 3092

I'm getting a hard "click/stick" on the bolt with all these charges. I've read others are having the same issue and I'm wondering if there was a really soft batch of brass that went out. I'm getting case growths of almost .010" per firing!!!

 

[THE SENTINEL]

Do you have the Norma Brass lot number?

 

[McCrazy]

Anyone else have any data for the 198 grain Flat Lines?

I'm in the process of getting a 300 NM barrel for my DTA and trying to get load recipes to work from. Looking like maybe Retumbo, VVN570, and RL-33 are the primary choices.

So far only 1 guy said he was running the Flat Lines and that was with RL-33.

My barrel will be 28" Bartlein with 1-8 twist.

Thanks

 

[surgeon260]

Anyone finding this brass sucks???

I'm getting case growths of almost .010" per firing!!!

This is part of the reason I went with a 40 degree improved version. Case stretch is virtually non-existent. Primer pockets are the weak link for me. But I tell myself that complaining about brass life for 300 Norma is like complaining about the gas mileage of your Ferrari. Performance comes at a cost. With 230 Bergers at close to 3100, brass life becomes more palatable. That's not to say I am not pulling for Lapua to start making brass. Come on Lapua!

 

[GoldenFinger]

Do you have the Norma Brass lot number?

I can get you this info Wednesday, out of town at the moment.

 

[GoldenFinger]

do you have the norma brass lot number?

bl10522

 

[THE SENTINEL]

I bought some once fired 300 Norma brass .My Redding body die wont size 7 rounds ,You cant close the bolt handle with out allot of force.The body die is all the way down.The length of the brass is 2.490 ,same as the other brass that is chambering without issue.I am using Redding die set s bushing die.7 ROUNDS OUT OF 280. Would a full length sizer make a difference?

 

[GoldenFinger]

Sentinel,
I was having the same issue, but using Widden FL dies. I have found I have to trim to 2.480 after resizing and everything starts to run smoothly

 

[Seandradamus]

I use them , they recommend a faster burning powder than normally used with the weight class.

i use H4831 and rl 26 they get 3075 and 3115 respectively
i have a 22" Barrel. I'm loading to 3.8 OAL which is jumping a mile and they shoot very small groups.

Anyone else have any data for the 198 grain Flat Lines?

I'm in the process of getting a 300 NM barrel for my DTA and trying to get load recipes to work from. Looking like maybe Retumbo, VVN570, and RL-33 are the primary choices.

So far only 1 guy said he was running the Flat Lines and that was with RL-33.

My barrel will be 28" Bartlein with 1-8 twist.

Thanks

 

[Simia Dei]

Anybody have a clue what is up with Berger's load data for the 230s? They list a max load of 89.1 grains of Retumbo, but it sounds like no one is getting close to that without major pressure signs. It seems like most people are running 84-87 grains of Retumbo. What gives?

Regarding this incorrect data, did everyone commence their load dev with a lower charge or did you still just use the Berger recommended minimum? I just loaded my first lot for zeroing and shooting the rifle in at 84.5gr of retumbo and am wondering whether I should empty the lot and use a lower charge to start and to commence load dev with.

 

[Barney88PDC]

I'd say you are fine.

 

[jonthomps]

Picked up the new GAP hunting build and I found a screamer of a load right off the bat! Double based powders (N570, RE-33, etc) are where it's at for the Norma - lower pressures and high velocities.

Berger 215gr Hybrid
Norma brass - 3x fired
FGMM 215 primer
88gr N570
.015 jump
Bartlein 27" 1-10 Sendero contour
3063fps
SD: 5.7

These velocities are through a brand new barrel - 44rds fired so far. It should pick up speed as it breaks in. Couldn't be happier.

 

[jaredm]

Anybody use the Hornady 212 eld-x's ?

 

[jonthomps]

Anyone have any data on the 225gr ELD-M? With a G1 bc of .777 I figured they'd be worth a look.

 

[calvert]

I'm not getting near the velocities everyone is getting here. Have AXMC with new 300nm bartlein 1:10 twist, 26". Tried H1000, re33, and Retumbo and start getting severe
cratering at ~ 2750fps. Ejector swipes above that. 80gr Retumbo gives 2730 with cratering. Am I do something wrong? Suggestions?
Using 215 Berger hybrids and new norma brass

 

[jfields]

Something is definitely not right. I would start with a thorough cleaning of the neck area. I think there is a good chance of a carbon ring causing increased pressure. After that, I would check to make sure your brass is sized and trimmed to spec and that you are not jamming the bullet deep in to the rifling. Keep us updated.

-J

 

[calvert]

Update. It's a new barrel with 20rds thru it but I cleaned the crap out of . No carbon ring. Shortened the OAL, Definitely not jammed into the lands. Loaded 80gr H1000, 215 bergers and got 2850fps withe severe cratering and ejector swipes. I have some ABM ammo coming tomorrow so I will see how that shoots. Stumped
Thanks for response jfields.

 

[diverdon]

Calvert, I would be suspecting something with the barrel or how it is head spaced. If it were me I might invest in a set of gauges on the theory that if the barrel was not headspaced properly I could return it. I wonder if the .300 Norma uses the same gauges as the .338 Norma, if so you can get a set for $127 or less if you shop.

http://pacifictoolandgauge.com/impe...earch_query=300+Norma+Mag+headspace&results=6

 

[Lowlight]

it could be a problem with the reamer,

there were some bad PTG reamers for the 300NM out there, you might have had it chambered with the wrong reamer that is out of spec.

The first go of my 300NM had to be redone and they found out PTG messed the reamers up. Two seconds to fix it, but you have to bump it with the right reamer.

An AI Barrel should be pretty easy, pull it off and measure everything chamber wise.

 

[V-Ref]

My reamer print. As spec'd by Jimmie Sloan actual back in the day.

 

[Simia Dei]

Another random question from the token Aussie, how many rounds is it taking before you guys are seeing the barrel settle in to a consistent velocity. Mine is a 28" 9 twist bartlein. Just chasing an estimate to shoot through it before starting load development.

 

[calvert]

Update: Spoke with Mile High and AI. AI wants me to send rifle, barrel and some hand loads to them for evaluation. So, make take awhile before I get an answer

 

[jonthomps]

Another random question from the token Aussie, how many rounds is it taking before you guys are seeing the barrel settle in to a consistent velocity. Mine is a 28" 9 twist bartlein. Just chasing an estimate to shoot through it before starting load development.

I would give it 100 rds or so.

 

[Simia Dei]

I would give it 100 rds or so.

Thanks mate, I'd better get loading then!

 

[Barney88PDC]

I'm not sure if this caliber is different than mid range calibers like the 6mm and 6.5mm flavors but most people agree that in those calibers the barrel settles in by 150 - 200 rounds.

Calvert,
Could be an under gauged barrel. Meaning a tighter bore than it should be. Something certainly is wrong.

 

[whopper]

Anyone have any data on the 225gr ELD-M? With a G1 bc of .777 I figured they'd be worth a look.

225gr Hornady ELD-M, 3.619" OAL
2.850" base to ogive
84.5grs Hodgdon H1000 Lot#5569
CCI 250 Primer
Norma brass(new)
3013FPS/4.0SD


Sent from my iPhone using Tapatalk

 

[Milo 2.5]

How do you guys deal with the donut created inherently by this case?

 

[hypertex]

I almost hate to bring this up...but I noticed some posts inferring other than perfect bolt closing on a reload. I've had the 300NM since 2014 and at one point after reloading, noticed that none of the rounds would chamber. After close inspection I noticed that the die had split on a vertical axis from the lip up 1/3 way up the die. New die solved the chambering issue but...I'm wondering if this is too much case for a 7/8" die. Thoughts? Perhaps this needs its own thread...Bruno

 

[hypertex]

How do you guys deal with the donut created inherently by this case?

Pin gauge set to sort cases after resizing. Ream the donut. MSC has them in .001" increments. It's not like this case will last for 12-14 reloads like a 308

 

[Barney88PDC]

Norma Brass
CCI 250
87.0 H1000
Berger 215 @ 3.525" OAL
3050fps in a 27"
Silly accurate at 100 and at 1000.

 

[calshipbuilder]

how would I know if my chamber reamer was out of spec?

 

[Simia Dei]

Using Norma brass
CCI 250 primers
84.5gr of Retumbo (AR2225)
Berger 230 at 3.650 OAL
2908 fps, 28 inch barrel, SD of 6

Shot 25mm groups at 200m, 4 inch group at 1224m (was losing light, couldn't get more shooting in)

 

[Peterson Cartridge]

Hello .300 Norma Mag Shooters,

We are an American manufacturer of match-grade brass located in Pittsburgh, PA. We are working on our first run of .300 Norma brass and are looking for evaluation shooters to test it out. If you would be interested in receiving some samples and providing us with your feedback, please fill out the form at https://www.petersoncartridge.com/shooters/evaluation-registration

Happy Shooting!
Clint

 

[jfields]

Hello .300 Norma Mag Shooters,

We are an American manufacturer of match-grade brass located in Pittsburgh, PA. We are working on our first run of .300 Norma brass and are looking for evaluation shooters to test it out. If you would be interested in receiving some samples and providing us with your feedback, please fill out the form at https://www.petersoncartridge.com/shooters/evaluation-registration

Happy Shooting!
Clint

Done. I'll give it a try and report back.

 

[surgeon260]

Hello .300 Norma Mag Shooters,

We are an American manufacturer of match-grade brass located in Pittsburgh, PA. We are working on our first run of .300 Norma brass and are looking for evaluation shooters to test it out. If you would be interested in receiving some samples and providing us with your feedback, please fill out the form at https://www.petersoncartridge.com/shooters/evaluation-registration

Happy Shooting!
Clint

I signed up as well. I would love to give it a whirl in my 40 degree improved. Here's to hoping for Lapua-quality primer pockets!

 

[jonthomps]

Hello .300 Norma Mag Shooters,

We are an American manufacturer of match-grade brass located in Pittsburgh, PA. We are working on our first run of .300 Norma brass and are looking for evaluation shooters to test it out. If you would be interested in receiving some samples and providing us with your feedback, please fill out the form at https://www.petersoncartridge.com/shooters/evaluation-registration

Happy Shooting!
Clint

Signed up. Been shooting the 300NM for a few years now and I'd certainly be on board with finding a company that produces consistent, tougher 300NM brass.

 

[Clearlight]

Hello .300 Norma Mag Shooters,

We are an American manufacturer of match-grade brass located in Pittsburgh, PA. We are working on our first run of .300 Norma brass and are looking for evaluation shooters to test it out. If you would be interested in receiving some samples and providing us with your feedback, please fill out the form at https://www.petersoncartridge.com/shooters/evaluation-registration

Happy Shooting!
Clint

Signed up . Thanks for providing us with an opportunity for decent brass !