130 Berger Hybrids with H4350 and IMR4451 (RPR 6.5 CM PVA BARREL)

[Changed]

I am working to develop a load for each of the above powders. I have found clearly defined maxes in several books and from the Hodgdon's site. I will be running this ammunition in an RPR with a PVA 26" Barrel. My question is that as I prepare for the OCW load workup, I see quite a few folks posting loads well above max. Is there a rule of thumb about how far above max the true max is (again, I understand that this varies from rifle to rifle). If the book max for H4350 and a 130 is listed as 39.2. How far above that do most people venture (5%, 10%...etc.) when loading their OCW test. I don't want to spend time loading several iterations above the max if it may be to high. Dan Newberry indicated that one should load one iteration above max. We that would be far lower that may report their sweet spots to be. For example. With H4350 many people state that 42 grains is a well know sweet spot. That's a full three grains above book max. Is it common to go that far above max?

I'd like to add that, It is my intention to run the 130's in a Pmag, not and AI mag. So far my measurements indicate that I will be 10 thou off the lands at Pmag length. Anyone see an issue with that?


Also, do any of you have info to offer regarding with the above?

Thanks,

 

[demolitionman]

Cartridge?

 

[Changed]

Cartridge?

6.5 Creedmoor

 

[demolitionman]

6.5 Creedmoor

I'm running 130's with 41.6 h4350 touching the lands and what I gather from folks is I'm running a really really soft load compared to others.
I reckon guys who want to get the absolute best BC out of a bullet safely are loading till their gun shows max pressure, then backing off two or three tenths of a grain. I personally hit such a good accuracy node at 41.6 that I didn't want to chase more velocity, although I'm sure it would help on windy days.

You will need to find your own max, and back off from there. Obviously temperature of atmosphere and temperatrue of your bullets sitting in a hot car or range bag or in the sun will increase pressures too so keep that in mind. I shoot from cold to 90+ and I've never wanted to shoot max pressures because I can't count how many times I've grabbed ammo out of my hot truck to pop a chuck out of a beanfield.

 

[mojavejim]

I think your looking at 130 nosler AB info, max charge varies with each bullet( bearing surface/ shape of BT/ ect,) Just work up & watch for pressure signs, I think you'll be 3-4 gr. over that before you have any issues

 

[ocabj]

Furthermore, the 130 Nosler Accubond is 1.320" in length and is a spitzer design (long base to ogive length), and Hodgdon lists the COL in 6.5mm Creedmoor for that bullet as 2.750", which means lower cartridge capacity and explains the lower maximum.

The Berger 130gr AR Hybrid is 1.295" in length and is inbetween a VLD and BTHP. I seat it to 2.830" +/- and it is still jumping .015" to the lands in my 24" 1:8" Shilen chambered in 6.5mm Creedmoor. My load:

Berger 130gr AR Hybrid
43.5gr H4350
Lapua brass
CCI BR4 or Wolf SRM

MV = 2915fps

 

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Do any of you have the Berger Manual? Could you share the Berger start and max page? The data I am using is indeed from the Nosler book. Once I get above the max should I continue to jump up in increments of 0.5 grains? Or, should I go with 0.2-0.3?

Thank you all for your input. It is very much appreciated!


Sent from my iPhone using Tapatalk

 

[morganlamprecht]

43.1-43.3 grains of h4350 under a 130 hybrid jumping .020" in a saami chamber from a 24" barrel (2850 fps) toasted at least 4 barrels i know of last year....shot little ragged holes and made easy work of targets at distance in all of em

 

[Changed]

Ok, I obtained a copy of the info from the Berger Manual for H4350. They list a Start of 37.5 and a Max of 41.6.

So, Here is my plan for an OCW workup. Please advise as to how you would change it.

BRASS: Hornady Once Fired
BULLET: BERGER 130 AR Hybrid
PRIMER: CCI BR-2
POWDER: H4350

Sighters

S1 - 37.5 (90% of Book Max)
S2 - 38.3 (S1 + 7%)
S3 - 39.0 (S2 + 7%)

OCW (3 Each)
1 - 39.3
2 - 39.6
3 - 39.9
4 - 40.2
5 - 40.5
6 - 40.8
7 - 41.1
8 - 41.4
9 - 41.7 - MAX
10 - 42 - MAX +
11 - 42.3 - MAX ++
12 - 42.5 - MAX +++
13 - 42.8 - MAX ++++
14 - 43.1 - MAX +++++
15 - 43.4 - MAX ++++++

Any Issues with this?

 

[Mclark48]

What were your results I'm about to start loading the exact same thing...

 

[mjsand44]

I’m very interested as well. I’m about to do the in a gas gun.

 

[gnatmm]

I went down the very same path and ended with 41.5, 775m/sec. But it is a18” dpms gasser so YMMV

 

[CShooter92]

I'm running 130 hybrids, H4350 and Lapua Brass in my 6.5 Creedmoor. The Nosler reloading manual calls 43.0 grains as the max load for 130gr bullets. I did some OCW tests from 41.5 to 43.0 grains and nothing exhibited pressure signs. The 43.0gr loads aren't compressed either. They shoot great in my Surgeon with a 24" Hardy Barrel. Pretty much every charge weight from 41.5 to 43.0 shot well, I just went with 43.0.

I think my COAL is right about 2.831", so just a hair over factory spec. I'm only running them about 0.005-0.010" off the lands. Can't recall exactly offhand.

 

[Rmkeyjr]

Ok, I obtained a copy of the info from the Berger Manual for H4350. They list a Start of 37.5 and a Max of 41.6.

So, Here is my plan for an OCW workup. Please advise as to how you would change it.

BRASS: Hornady Once Fired
BULLET: BERGER 130 AR Hybrid
PRIMER: CCI BR-2
POWDER: H4350

Sighters

S1 - 37.5 (90% of Book Max)
S2 - 38.3 (S1 + 7%)
S3 - 39.0 (S2 + 7%)

OCW (3 Each)
1 - 39.3
2 - 39.6
3 - 39.9
4 - 40.2
5 - 40.5
6 - 40.8
7 - 41.1
8 - 41.4
9 - 41.7 - MAX
10 - 42 - MAX +
11 - 42.3 - MAX ++
12 - 42.5 - MAX +++
13 - 42.8 - MAX ++++
14 - 43.1 - MAX +++++
15 - 43.4 - MAX ++++++

Any Issues with this?

I am doing the same thing except with Lapua brass. It seems the accuracy node is between 43.0 and 44.0 for most people even with different setups. Why does Berger list 41.8 as MAX when best accuracy is clearly and safely above that? I have been going nuts because I have always thought the start and max loads actually meant something.

 

[Changed]

I am doing the same thing except with Lapua brass. It seems the accuracy node is between 43.0 and 44.0 for most people even with different setups. Why does Berger list 41.8 as MAX when best accuracy is clearly and safely above that? I have been going nuts because I have always thought the start and max loads actually meant something.

Hey, The max numbers on my post is greater than book max.

If they listed a real max, someone would blow himself up and try to sue.

Find the true max for your rifle by working up and stopping when you see pressure signs.

 

[emann1022]

The last episode on the podcast Adam spoke about working up in 0.5 grain increments until seeing pressure signs and then working just below max to find a load for the specific barrel. Maybe load one round per charge and find the max charge for your barrel and then do an OCW up to your known max charge.

 

[1jonathan1994]

43.1-43.3 grains of h4350 under a 130 hybrid jumping .020" in a saami chamber from a 24" barrel (2850 fps) toasted at least 4 barrels i know of last year....shot little ragged holes and made easy work of targets at distance in all of em

What brass?

 

[morganlamprecht]

Hornady

 

[Emad]

I am doing the same thing except with Lapua brass. It seems the accuracy node is between 43.0 and 44.0 for most people even with different setups. Why does Berger list 41.8 as MAX when best accuracy is clearly and safely above that? I have been going nuts because I have always thought the start and max loads actually meant something.

I'm loading Lapua brass with H4350, CCI450'S and 130 otm's at .015 jump. I load up to 44.0 but started getting heavy bolt lift at 42.5. I settled on a node at 41.4 running 2780fps single digits SD's and bug holes. It's a bit slower than I hope but shoots great and might help with barrel life.
Hope it helps, Cheers

 

[Strike_out]

H4350 Berger 130 43.5gr 2.820col
Shoots real nice

 

[abn31c]

Hey Strike, what brass?

 

[Triple D]

42.1gr H4350, Berger 130 AR Hybrid, Fed 210, Hornady brass, mag length. Cold bore was just outside, but the next 4 grouped nicely. 22” BA 6.5 creedmoor

 

[ddavis]

43.1-43.3 grains of h4350 under a 130 hybrid jumping .020" in a saami chamber from a 24" barrel (2850 fps) toasted at least 4 barrels i know of last year....shot little ragged holes and made easy work of targets at distance in all of em

Haven't seen this load NOT shoot well in Morgan's, mine or several other peoples rifles. Gets you 2820-2860 fps range.

 

[Strike_out]

Hey Strike, what brass?

Prime

 

[abn31c]

42.1 grn. H4350 fed 205m in lapua brass pushes 130 hyb 2885 fps in a cold 28° barrel. 24 inch. Makes little tiny groups. Running 10 thou off.