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

The_Count

Found It....
Nov 13, 2012
466
55
28
Land of Spanish Moss
#1
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,
 
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demolitionman

Sergeant of the Hide
Feb 26, 2013
1,118
347
83
Ohio
#4
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.
 
Last edited:
Jan 27, 2013
127
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18
51
So Cal Mountains
#5
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
 
Sep 8, 2003
106
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Riverside, California
#6
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
 

The_Count

Found It....
Nov 13, 2012
466
55
28
Land of Spanish Moss
#7
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
 
Nov 5, 2013
690
306
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#8
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
 

The_Count

Found It....
Nov 13, 2012
466
55
28
Land of Spanish Moss
#9
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?


 
Feb 13, 2017
56
16
8
#13
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.
 

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