338 Norma

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midgetoramaXGunny Sergeant
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338 Norma Loads
10/20/2014 Last edited 10/21/2014 by midgetorama

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I am shooting a 9.5 twist Bartlein that finishes at 26".

With a 300 grain SMK I am getting slight ejector marks with 85.0 grains of IMR 7828 SSC and a CCI250 with Norma brass. Velocity is only 2715 fps.

The best accuracy with this bullet, powder, primer combo is 82.5 grains at 2632 fps. Single digit ES.

I am seating the bullet with a 0.025" jump.

I was expecting better velocity. I may try Retumbo eventually.
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midgetoramaXGunny Sergeant
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Re: 338 Norma Loads
10/23/2014

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300 SMK
GM215M
88.5 gr H-1000
COAL 3.565"
2690 fps with 12 fps ES over 10 shots
~0.233 MOA at 300 yards
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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
10/29/2014 Last edited 11/03/2014 by xdeano

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Thank you for getting with us at Berger Bullets. We are glad to forward our updated Berger Load Data for use with your .338 Norma Magnum.

.338 Norma Magnum
300 Grain, PN: 33556 Bullet, CIP 3.681" COAL, 26" Barrel. 5/28/2014 RB
Bullet	Powder	Start Load In Grains	Approx. Start Velocity	Max. Load In Grains	Approx. Max. Velocity	Fill Ratio
300 Grain	Magpro	80.0	2497	84.0	2618	93%
300 Grain	RE-33	91.0	2544	95.5	2689	102%
300 Grain	H-1000	81.5	2480	85.6	2603	102%
300 Grain	Retumbo	85.5	2531	89.9	2655	105%
300 Grain	Norma MRP 2	81.0	2497	85.3	2624	100%
300 Grain	Viht. N570	86.5	2548	91.0	2694	101%

Please do not hesitate to get back with us if we can be of further assistance for you.



Kind Regards,

Berger Bullets Technical Support Team

[email protected]

----------------------------------------------------------------------------------------------------------------------------
Hope this load info from Berger would help someone out.
Xdeano

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waveslayerXGunny Sergeant
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Re: 338 Norma Loads
12/04/2014

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300 SMK

3.60

Fed215

Retumbo 87.5

Velocity at 2712 SD=8

DTA, 22" .338 Norma Mag AI, a damn tack driver

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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
12/15/2014

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For those of you shooting Cutting Edge Bullets.

.338 Norma Mag. 225 gr, Cutting Edge, MTH D62 SF

O. A.L: 3.681" = 93.50 mm Barrel: 28.0" = 711.2 mm

!!! - YOU MUST START 6 grains UNDER LISTED, and WORK UP - !!!

Powder	Loading Ratio	Charge (Grn)	Vel. (Fps)	Prop.Burn	EST max psi
Vihtavuori N560	102.5	93 .5	3170	99.7	63000
Ramshot Magnum (Big Boy)	104.9	100.2	3169	100.0	63000
Accurate MAGPRO	102.8	97.5	3164	99.0	63000
IMR 7828 SSC	101.2	92.8	3156	99.8	63000
Alliant Reloder-22	102.8	92.8	3140	100.0	63000
Alliant Reloder-25	108.0	95.9	3138	100.0	61443
Vihtavuori N570	108.0	101.7	3105	96.4	54345
Alliant Reloder-19	99.7	89.0	3095	100.0	63000
Hodgdon H4831 SC	100.9	91.0	3074	99.4	63000
IMR 4350	97.5	83.3	3069	100.0	63000
IMR 4831	99.6	85.1	3032	100.0	63000
Hodgdon Hl000	108.0	95 .4	3022	99.4	55473
Hodgdon Retumbo	108.0	96.9	2967	100.0	48127

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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
12/15/2014

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.338 Norma Mag. 252 gr, Cutting Edge, MTH D65

O.A.L: 3 .681" = 93.50 mm Barrel: 28.0" = 711.2 mm

! !! - YOU MUST START 6 grains UNDER LISTED, and WORK UP - !!!

Powder	Loading Ratio	Charge (Grn)	Vel. (Fps)	Prop.Burn	EST max psi
Vihtavuori N570	108.0	97 .6	3001	98 .0	57844
Ramshot Magnum (Big Boy)	103.4	94.8	2997	100.0	63000
Vihtavuori N560	100.9	88.3	2996	99.9	63000
Accurate MAGPRO	101.2	92.2	2993	99.5	63000
IMR 7828 SSC	99.7	87.7	2982	100.0	63000
Alliant Reloder-25	107.0	91.2	2979	100.0	63000
Alliant Reloder-22	101 .2	87.7	2964	100.0	63000
Hodgdon H1000	108 .0	91.5	2905	99.9	58589
Hodgdon H4831 SC	99.4	86 .1	2905	99.8	63000
Hodgdon Retumbo	108.0	93.0	2859	100.0	51060

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Thrust911

XFirst Sergeant
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Re: 338 Norma Loads
02/25/2015

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Any more load info to share? Particularity the 300gr Hybrid on top of H-1000?
I'm interested in velocity people are seeing out of 26" to 27" tubes.
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TheflyingpoleXCorporal
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Re: 338 Norma Loads
02/27/2015

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Any one try US869. 1smalljohnson told me to give it a try. I've just started messing with it. The highest I went was 99 grains and if I remember correctly I was in the mid 2700s. This was with a Berger 300 out of a 26" barrel. I'll post more after this weekend hopefully.
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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
03/11/2015

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Im pushing the 300 otms at 2785fps.
88.7grns h1000
Fed 215mag primer
In a 26" tube, suppressed.
It shoots very well at a mile.

Xdeano

---------------------------------------------
--- Thrust911 wrote:

Any more load info to share? Particularity the 300gr Hybrid on top of H-1000?
I'm interested in velocity people are seeing out of 26" to 27" tubes.

---------------------------------------------
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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
03/11/2015

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I have a good buddy that is using us869 in his 300rum pushing 230s. Ive thought about it, but what he is running into is a lot of carbon buildup, carbon ring.

If a guy is looking for a powder, definitely give rl33 a shot. Ive ran some of it and it gives excellent velocities.

Xdeano

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--- Theflyingpole wrote:

Any one try US869. 1smalljohnson told me to give it a try. I've just started messing with it. The highest I went was 99 grains and if I remember correctly I was in the mid 2700s. This was with a Berger 300 out of a 26" barrel. I'll post more after this weekend hopefully.

---------------------------------------------
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xdeanoXFirst Sergeant
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1038 posts this site
Re: 338 Norma Loads
03/11/2015

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Here is some info on rl33.
97.7grns rl33
300grn berger otm.
215mag
2863fps 26" barrel
3.725" coal - single load.
Es 14.22
Sd 7.00
This gave me a 0.103" center to center group at 100yds.

I did a quick velocity check prior to loading for groups.
1. 95.0grn-2738fps
2. 96.0grn-2788
3. 97.0grn-2732 - velocity dip.
4. 98.0grn-2861
5. 99.0grn-2899 - hard bolt lift

I shot these 5 rounds at 300yds and the resulting group was 2".
Xdeano
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BobLSwagger

XFirst Sergeant
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Re: 338 Norma Loads
03/17/2015

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How did you manage to fit that much powder in the case with that longgggg 300gr Berger?

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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
03/17/2015 Last edited 03/17/2015 by xdeano

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BobLSwagger wrote:
How did you manage to fit that much powder in the case with that longgggg 300gr Berger?​

It'll fit...

I know it seems like a lot, but the density of the RL33 is higher then say H1000 where you'd have a hell of a time with 90grns.

xdeano
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BobLSwagger

XFirst Sergeant
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Re: 338 Norma Loads
03/17/2015

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xdeano wrote:

BobLSwagger wrote:
How did you manage to fit that much powder in the case with that longgggg 300gr Berger?​

It'll fit...

I know it seems like a lot, but the density of the RL33 is higher then say H1000 where you'd have a hell of a time with 90grns.

xdeano​

Looks like I'm going to have to give the reloader 33 a shot in my .338 Warthog... (.338 NMAI). I'm currently running 93gr of Retumbo with Berger 300gr OTM's @ 2893fps out of a 28" Bartlein 1:9.3

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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
03/18/2015

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Definitely worth the try. You'll see how dense the 33 is.

xdeano
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xdeanoXFirst Sergeant
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1038 posts this site
Re: 338 Norma Loads
03/18/2015

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Theflyingpole wrote: Any one try US869. 1smalljohnson told me to give it a try. I've just started messing with it. The highest I went was 99 grains and if I remember correctly I was in the mid 2700s. This was with a Berger 300 out of a 26" barrel. I'll post more after this weekend hopefully.​

I've got some data for you on the US869.
90.0 - 101.3grns US869
300grn bullet
@100.0grns = 2710fps

Now this is not my data so start low and work up. Same as usual.

xdeano
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Eric608XPrivate
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Re: 338 Norma Loads
03/19/2015

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Has anyone tried the Lapua 300 grain bullets?
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xdeanoXFirst Sergeant
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1038 posts this site
Re: 338 Norma Loads
03/20/2015

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Whats the question? They will work just fine.
Xdeano

---------------------------------------------
--- Eric608 wrote:

Has anyone tried the Lapua 300 grain bullets?

---------------------------------------------
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BonczykXCorporal
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Re: 338 Norma Loads
03/24/2015

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My 28" Lilja 1-10 got:



2825 with 90,6 grains Norma 217 behind a 300 Berger Hybrid. COL: 3.6393.

2694 with 88,0 grains Norma MRP2 behind a 300 Berger Hybrid. COL: 3.6393.

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garandmanXFirst Sergeant
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Re: 338 Norma Loads
04/23/2015 Last edited 04/23/2015 by garandman

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89.0 gr of H-1000 with 300gr Berger OTM

3.602 Cartridge Length ... I'm a couple thousandths off the lands.

Averaging close to 2800 fps from 27" bbl.

5-shot groups were 1.125 @ 200 yards.

I managed one 3-shot group at 200y for 0.625" NOT sure I could reproduce it.



I'd strongly recommend Berger boolits across the board. My 6.5 CM loves them too. Super high ballistic coefficient on both calibers.



My Retumbo tests for 338NM were averaging 2715 fps.

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gewehrXGunny Sergeant
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Re: 338 Norma Loads
06/28/2015

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26" bartlein 10 twist,

300 berger, 3.656" oal, 85.0 grains IMR 7977, 2710 fps

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NormaMagXPrivate
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Re: 338 Norma Loads
07/26/2015 Last edited 07/26/2015 by NormaMag

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xdeano

Close to 2900 fps from a 338 Norma out of a 26" barrel?

How is brass life?

I`m building a 338 Norma with a 30" Pacnor 1-9 twist barrel and hoping for 2850 fps with good brass life.

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xdeanoXFirst Sergeant
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Re: 338 Norma Loads
08/03/2015

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brass life seems to be good. I'm not running a lot of the rl33. my main load is h1000 which i have previously listed on this page. but with RL33 a guy can get up there in velocity. Just giving the guys some insight. My numbers will vary from others.



xdeano

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TheflyingpoleXCorporal
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Re: 338 Norma Loads
01/28/2016

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Just saw this. Thanks. Life got in the way and I haven't messed with this in ages. Hopefully this weekend.

> xdeano wrote:
> > Theflyingpole wrote:> > Any one try US869. 1smalljohnson told me to give it a try. I've just started messing with it. The highest I went was 99 grains and if I remember correctly I was in the mid 2700s. This was with a Berger 300 out of a 26" barrel. I'll post more after this weekend hopefully.> I've got some data for you on the US869.

90.0 - 101.3grns US869
300grn bullet
@100.0grns = 2710fps

Now this is not my data so start low and work up. Same as usual.

xdeano​

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SPAK7XFirst Sergeant
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Re: 338 Norma Loads
06/19/2016 Last edited 06/19/2016 by SPAK7

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Bartlein 30" 9:5 twist suppressed
89.0gr H1000 fed 215 Berger 300 otm coal 3.675"
2825fps sd 9
Barrel only has 72 rounds on it. Might see some increase in speed with some more rounds down the tube. We'll see.

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Thrust911

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Re: 338 Norma Loads
07/05/2016 Last edited 07/05/2016 by Thrust911

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Area 419 built Deviant action in AI AX CIP length chassis.
Hawk Hill, 9.3 Twist, 27" tube.

215 Primer
88gr H1000 - zero pressure signs.

300gr Hybrid -- 2773 FPS avg SD 3
285gr Amax -- 2789 FPS avg SD 11.5

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Thrust911

XFirst Sergeant
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Re: 338 Norma Loads
08/16/2016

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Settled on 89gr of H1000 pushing a 300gr Berger. Shot it on a ridiculously hot day...occasional ejector swipe, primers look good, no sticky bolt. At 1071 yards it hits steel with authority.

15k off the lands
AVG 2809FPS, SD of 4.3, ES of 9

Also will note that for my barrel the POI is the same for both 88gr and 89gr of H1000.

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inferno218XSergeant
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Re: 338 Norma Loads
09/25/2016

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Has anyone tried any 256 Flatlines yet?

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SPAK7XFirst Sergeant
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Re: 338 Norma Loads
09/25/2016

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inferno218 wrote:

Has anyone tried any 256 Flatlines yet?​

Not yet but it's definitely on the to do list...the 255 flatliners definitely have my attention for the Norma.

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inferno218XSergeant
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Re: 338 Norma Loads
10/08/2016

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I started working on my Warner 256 the other day and i think i am close to a load. I will have a chrono out next week and will post up numbers with load info.

 

[whiter02]

I'm getting ready to start load development on my new 338 norma mag. I will be running the berger 300's and RL33. I was just wondering what everyone else's load looked like running this combo.

 

[cperazza]

Rifle Configuration:

• Action: Defiance Deviant Tactical
• Barrel: Krieger MTU 9.3T 27"
• Brake: Thunderbeast 338BA 3/4-24
• Trigger: TacSport Single Stage
• Stock: McMillan A5 Adj
• DBM: Badger M5 CIP

Load and atmospherics:

• Bullet: 300 gr Berger OTM Hybrid
• Brass: Virgin Norma Brass
• Primer: CCI 250
• OAL: 3.690
• Seated: -0.015 Jump
• Powder: H1000 89 gr
• Velocity: 2,825 fps
• ES: 5.5 fps
• 1,000 yds group:
  • 4.42" (3x shot)
  • 5.58" (3x shots)
  • 6.64" (4x shots)
• Temp: 43°F
• Elevation: 343'
• Winds: 5-10E @1,000 yds, 5-10W @ Target

 

[Highmark]

Like your results, Having a rifle built now similar to yours , same trigger ,Barrel will be a Brux 9.3T 30" , will be using H1000 to star around 87.0 and up from there , were you seeing any pressure signs at 89?

 

[SPAK]

89.0 gr h1000 Under 300gr Berger shot lights out in my 30” barrel. No pressure issues.

 

[cperazza]

Highmark: Just like SPAK stated, no issues with that load. I started 87.5 went to 89.5. Accuracy node 88.5-89.0 gr H1000.

 

[MACHTECH]

Found a great load for my factory 27" AI .338 Norma and thought I would share it.

Peterson brass, 85.5 grains of Retumbo, gm215m primer, Hornady 285 eldm seated .005 off the lands.

5 shot group at 100 yards:

 

[DC67]

I have a question (or favor) for the group. I am making display for my brother who is a sniper. Would anyone be willing to make me 2 inert .300 NM and .338 NM cartridges? I will pay for them. I do have some specifications that I will discuss. Please let me know and thank you guys.

 

[Steel head]

Found a great load for my factory 27" AI .338 Norma and thought I would share it.

Peterson brass, 85.5 grains of Retumbo, gm215m primer, Hornady 285 eldm seated .005 off the lands.

5 shot group at 100 yards:
View attachment 7076264

My buddy got similar results with 85.5 grains of H1000 and 285’s in norma brass.

 

[codyadams]

Got a little data to add.

Rifle specs:
Rem 700 action
24" Lilja 9 twist #5 spiral fluted
MBM 5 port ti brake
Manners EH-1
March 2.5-25x52

All loads use Peterson brass and fed GM215M primers.

300 Berger EH, H-1000, .020" off (3.685" OAL):

86.0- 2594
86.5- 2613
87.0- 2621
87.5 - 2606
88.0 - 2673

300 Berger EH, IMR7828SSC, same seating:

80 - 2539
81 - 2578
82 - 2615
83 - 2662
84 - 2669
85 - 2714 - near max

285 Hammer Hunter, H-1000, .020" off, OAL 3.833", really long bullets:

87.0 - 2740
87.5 - 2731
88.0 - 2736
88.5 - 2763
89.0 - 2784

Next up for testing is the 265 ABLR, and VV-N570 with listed bullets. May pick up some RL33 to try as well. Have 114 rounds down the barrel now, the barrel should be settled.

 

[M77]

Some Recent Data :


DT SRS A1 - 338 NM 26" Factory Barrel
Short throat for the factory DT's for some reason , but they still work well

300 Berger OTM- Norma Brass - Federal 210 GM Primer - 87gr Retumbo / AR2225 / 2.745" CBTO /
2740 FPS - Magneto speed

285 Hornady ELD-M- Norma Brass - Federal 210 GM Primer - 88.3gr Retumbo / AR2225 / 2.710" CBTO /
2770 FPS - Magneto speed

both loads shoot in 4-5 SD's , and shoot really well down range

 

[M77]

Some Further Testing using 2217/h1000 powder
testing from my DT SRS A1 338NM 26" factory barrel 1:10

 

[jdnoble]

Great info!

 

[Jakeweb09]

I haven’t seen a ton of info on the Berger 250 elite hunters for the 338 Norma. Seems like a better fit for the case capacity over the 300 grain pills. I’ve got a brand new Norma and it is throated for the 300 grain Berger’s but I’ll be starting with the 250s. Starting at 83.5 grains of h1000 as I can’t find much info to start at. so we will see how it goes this Wednesday. Will post results and here and hope some more people post theirs. Also thinking of trying the 260 or 246 hammer hunters with h1000 for a dedicated hunting load on this, and was told by hammer to start at 88 grains

 

[CATM15]

Just got into a 338 NM and slowly gathering load info before my rifle shows up. What kind of brass/barrel life are you getting ? And with the current powder shortage does anyone have a good load for the 285 eldm with RL22 (I’ve got a lot of that for my 300wm but nothing else).

 

[M77]

I'm on 6 loads with Norma brass , that includes load development so a few hot ones in that pile . Working really well so far single digit SD's and great Velocities as you can see in my table

 

[king1886ranch]

Has anyone used 230 eld-x with Reloader 22? Just looking for a starting point and work my way up.

 

[Shoots 700's]

Any feedback on the Berger 250 in the Norma?

 

[M77]

I've shot the 250 Berger OTM behind 90gr of Retumbo and 88.3gr of h1000. It shot excellent but I preferred heavier

 

[dan440]

So, I.ve been here for awhile so I might as well start sharing some of the data I've gathered for the 338NM.
Found a load with SW 50BMG and 300g Lapua's.

I know, 3 shot groups, but still pretty happy.

Still need to see how temp resistant this is, but with powder availability thought someone might be interested.

Terminus Kratos action, Brux 30in barrel, Shooters World 50BMG 300g Lapua Secnar, FED 210M , Peterson Brass. 3 shot groups 100yds
Charge Weight	Avg vel.	SD	ES	notes
95	2720	14	28
95.5	2735	8	14
96	2747	2	4	.25 MOA
96.5	2759	7	15	sticky bolt lift

 

[Moses42ak]

Has anyone worked up any loads with 300 grain SMK’s, CC’s or OTM’s using LRT? Nearing the end of my build and going to start load development.
Thanks

 

[G8TOR]

I am working up loads with N165 and 300 grain Berger OTMs. I have not seen any load data for this powder, but it is listed as on the Vhit Website as a stable and accurate powder for heavier bullets, especially suited for the 338 LM. Any thoughts on what a decent starting charge would be in a 28" barrel 1-10 twist for 338 NM?

 

[G8TOR]

So, I.ve been here for awhile so I might as well start sharing some of the data I've gathered for the 338NM.
Found a load with SW 50BMG and 300g Lapua's.

I know, 3 shot groups, but still pretty happy.

Still need to see how temp resistant this is, but with powder availability thought someone might be interested.

Terminus Kratos action, Brux 30in barrel, Shooters World 50BMG 300g Lapua Secnar, FED 210M , Peterson Brass. 3 shot groups 100yds
Charge Weight	Avg vel.	SD	ES	notes
95	2720	14	28
95.5	2735	8	14
96	2747	2	4	.25 MOA
96.5	2759	7	15	sticky bolt lift

That's an awesome shot group. I did not know you could work up SW 50BMG in 338 NM with that accuracy. Did you have a compressed load at the 96 or 96.5 gr loads?

 

[dan440]

That's an awesome shot group. I did not know you could work up SW 50BMG in 338 NM with that accuracy. Did you have a compressed load at the 96 or 96.5 gr loads?

Not quite, but I'm at 3.618 OAL.

 

[G8TOR]

Spoke to Bob Blaine, Capstone Precision Group, and got the following load data for Berger 300 OTM with Vit N165.

338 NM
28" Barrel
3.680 COAL
N165 77.0 gr @ 2,561 fps
N165 80.8 gr @ 2,603 fps
96% Case Fill

No data yet for Ramshot LRT, but will share that load date once available.

 

[Moses42ak]

G8TOR you might want to watch the N165 as it hasn’t proven to be temp stable to my shooting buddy. He worked up a good load pushing 300 grain SMK’s in the winter in Fairbanks but when summer rolled around he had crazy pressure signs every time he shot it. Enough to scare him away from using it. Stuck bolt (not sticky but stuck), blown primers etc.

 

[G8TOR]

G8TOR you might want to watch the N165 as it hasn’t proven to be temp stable to my shooting buddy. He worked up a good load pushing 300 grain SMK’s in the winter in Fairbanks but when summer rolled around he had crazy pressure signs every time he shot it. Enough to scare him away from using it. Stuck bolt (not sticky but stuck), blown primers etc.

Appreciate the good G2. Do you know if he was using a compressed load?

 

[Moses42ak]

I don’t believe he was compressed, but close. He was running them at 2,750 FPS with 86.6 grains of N165

 

[Steel head]

G8TOR you might want to watch the N165 as it hasn’t proven to be temp stable to my shooting buddy. He worked up a good load pushing 300 grain SMK’s in the winter in Fairbanks but when summer rolled around he had crazy pressure signs every time he shot it. Enough to scare him away from using it. Stuck bolt (not sticky but stuck), blown primers etc.

If your sporty enough in the cold even the best temp stable powder probably won’t like the heat.

In my 7 saum and 338 edge it’s had pretty good success at a mild temp speed gain.

 

[Steel head]

I don’t believe he was compressed, but close. He was running them at 2,750 FPS with 86.6 grains of N165

I’ll pass that on to my buddy as he was curious about N165 in his 338 Norma.

 

[G8TOR]

G8TOR you might want to watch the N165 as it hasn’t proven to be temp stable to my shooting buddy. He worked up a good load pushing 300 grain SMK’s in the winter in Fairbanks but when summer rolled around he had crazy pressure signs every time he shot it. Enough to scare him away from using it. Stuck bolt (not sticky but stuck), blown primers etc.

Moses42ak,

I'm shooting in Florida where temp stability is not an issue. As long as you keep your powder and primers in the house during summer. You can shoot pretty much all yea long and never expect your ammo to vary from 72-80 degrees, unless you have your rounds sitting in the open sun.

 

[Moses42ak]

Should be GTG then!

 

[Dave62677]

got some free time this weekend and work up some load development with lighter bullet.

250smk 88.2 RL 26
Avg 2925, ES 10 after 8 shots. No pressure sign at all, easy bolt lift.

going to try the badlands 255gr high BC bullet later.

 

[Justgoingdownrange87]

I haven’t seen a ton of info on the Berger 250 elite hunters for the 338 Norma. Seems like a better fit for the case capacity over the 300 grain pills. I’ve got a brand new Norma and it is throated for the 300 grain Berger’s but I’ll be starting with the 250s. Starting at 83.5 grains of h1000 as I can’t find much info to start at. so we will see how it goes this Wednesday. Will post results and here and hope some more people post theirs. Also thinking of trying the 260 or 246 hammer hunters with h1000 for a dedicated hunting load on this, and was told by hammer to start at 88 grains

Jake, what did you end up settling on? I’d like to hear what you found out as I’m shooting 250gr otm’s using h1000. Any info would be great! Thanks!

 

[Jakeweb09]

Jake, what did you end up settling on? I’d like to hear what you found out as I’m shooting 250gr otm’s using h1000. Any info would be great! Thanks!

Gosh it’s been sometime since I worked with this but if my memory serves me correctly I was a 88.6 grains for with the 250s. They shot right at 1/2 minute and held that out to 900 yards or so. I can’t remember the velocity I ended at but I think it was around 2750. Seemed kinda slow but was very accurate

 

[Justgoingdownrange87]

Gosh it’s been sometime since I worked with this but if my memory serves me correctly I was a 88.6 grains for with the 250s. They shot right at 1/2 minute and held that out to 900 yards or so. I can’t remember the velocity I ended at but I think it was around 2750. Seemed kinda slow but was very accurate

Thanks Josh! I’ll work up to and and see what I can get.

 

[jdnoble]

Any RL33 suggestions?

 

[Moses42ak]

Did the posts get lost in migration?

 

[bbhank]

@lowlight

can you fix this thread. only one of 37 posts are showing!

 

[thejeep]

.

 

[Moses42ak]

Got some data from Hodgdon, figured I would share.

 

[Moses42ak]

Not sure if that is viewable or not. If it isn’t, I’m sure I’ll hear about it and find another way to post it.

 

[G8TOR]

Sweet...Moses42ak! Finally some new data for an impressive caliber. I've been reloading Sig Sauer brass with 76gns 7282ssc, CCI 250, with 300 grn Berger OTM Tactical Hybrids. Shooting out a SPR lathed 30" Bartlein MTU 9.3 two. Shot groups are as expected - taking out Bug eyes!

 

[CATM15]

Thanks for posting more load data on this!! Shocker for me cuz the load for my bullet selection shows me 3.6gr over max lol

Hornady 285gr ELDM
H1000-89gr
Fed LRRM
COAL 3.675

Velocity 2726fps
SD 7

Works great with no signs of pressure in my rifle.

 

[Moses42ak]

I’ve played WAY over what they have listed and way over what I’m sure Alliant would list. I had 2885 FPS with a 300 grain SMK from a 26” barrel. That proved to be a little harsh on the brass. Can’t say that any of it produced viable groups though.

 

[Riflecountry]

Sweet...Moses42ak! Finally some new data for an impressive caliber. I've been reloading Sig Sauer brass with 76gns 7282ssc, CCI 250, with 300 grn Berger OTM Tactical Hybrids. Shooting out a SPR lathed 30" Bartlein MTU 9.3 two. Shot groups are as expected - taking out Bug eyes!

How is the Sig Brass?

 

[G8TOR]

Really sweet. I will tell you case dimensions are as close to spec as you can get. They don't box them like Petersen or Lapua...(plastic resealable bags. but I am on my 3d reloading with them and I am satisfied so far. I bought them from Bayou Brass and Ammo and they were just shy of a $1.50 a case.

 

[Riflecountry]

Really sweet. I will tell you case dimensions are as close to spec as you can get. They don't box them like Petersen or Lapua...(plastic resealable bags. but I am on my 3d reloading with them and I am satisfied so far. I bought them from Bayou Brass and Ammo and they were just shy of a $1.50 a case.

Thank You!

 

[G8TOR]

I’ve played WAY over what they have listed and way over what I’m sure Alliant would list. I had 2885 FPS with a 300 grain SMK from a 26” barrel. That proved to be a little harsh on the brass. Can’t say that any of it produced viable groups though.

 

[G8TOR]

What would you all think about starting at 85.0 gns of Retumbo with 300 gn Berger OTMs in a 30 Barrel with an additional 9 inches suppressed?