6.5 Creedmoor Load with Alpha Brass

rockywlw

Private
Minuteman
Dec 17, 2017
30
3
12
I'm working up a load for my RPR 6.5 Creedmoor using small primer Alpha brass. I'm using H4350 and 142 Sierra HPBT and 450 primers. Tonight I worked up to 41.2 grains that gave me 2660 fps. The brass shows no pressure issues and I was planning on going on up .3 at a time. What is thought to be the max with this brass and powder? I would like to get up around 2700 or so. I got my best group to date at 40.6 around 2620 fps. What is everyone's experience with this load or similar. Thanks Sierra lists mx load at 42.3 but maybe not with Alpha brass?
 

canezach

House of Chingasos
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Apr 18, 2014
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I’m using their LR primer brass, but at 40 grains of RL16 and a 140 ELDM, I’m in the mid 2700s. Not apples to apples, I know. If I remember correctly, Sierra’s testing was done with Hornady brass.
 
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regency

Sergeant
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Nov 16, 2007
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I had been shooting 130 Bergers with 42gr of h4350. Got a new lot of powder and now I'm 35fps faster and have some slight bolt resistance. Got to drop it down some now.

Muzzle velocity was in the mid 2,800's but after correcting the muzzle velocity down range. I had to adjust it up to about 2,950ish on my kestrel.
 

Lonestar1027

LT
Belligerents
May 11, 2017
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Shooting 130gr OTM Bergers, 40.6 gr of RL16 pushing 2830ish. SD of 7-8, really consistent and easy load. Sub MOA groups out to at least 500 yards- haven't tried to group past that. Love my Alpha Brass!
 

rockywlw

Private
Minuteman
Dec 17, 2017
30
3
12
I tried some 41.9 grain H4350 in my Alpha srp brass tonight. With 142 Sierras my crony said 2692 avg. No pressure signs yet but much over 2700 seems like unlikely. Maybe my crony is slow?
 

Praeger

Sergeant of the Hide
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May 17, 2017
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My 6.5CM load is 42.5g of RL16 using SMK 142 and Hornady brass. I'm averaging 2844 fps on a 26" 1-8 barrel. Work your way up slowly, but you should easily be able to get to 2800+ fps.
 

rockywlw

Private
Minuteman
Dec 17, 2017
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I think Ill stay where I'm at. Even the guy at Alpha said if you get to 2750 your maxing the load. At 2656 my load is accurate and should be easy on the barrel. At 1000 yards the difference isn't that much.
 

Triggs75

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Feb 20, 2013
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Did you chop your barrel length on your rpr? Not sure if this brass is much less volume then Norma or Nosler brass. Should be getting more around 2800 I would think.
 

mojavejim

Sergeant
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Jan 27, 2013
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I've found with the Alpha reduced case capacity I'm usually about 5% less powder & 5% less velocity than most other 6.5CM brass. (hornady, lupua, starline). I should note that my Alpha is from one of their first runs, I bought 400-500 pieces to play with before the Lapua was available. The brass is good quality & will last several firings but is a little more difficult doing load development and I don't care for the "early pressure signs"
 

rockywlw

Private
Minuteman
Dec 17, 2017
30
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I have settled for now on 41.5 gr of H4350 and the Sierra 42 HPBT. I'm getting good accuracy and 2665 fps so it should be mild on the barrel. I will play more later with different loads.
 

canezach

House of Chingasos
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Apr 18, 2014
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What early pressure signs are you referring to? Just curious
I could be mistaken, but I don't think he means early pressure signs as in you'll see signs even at reasonable pressures for the brass, but that since Alpha has lower case capacity, you'll see pressure signs at lower charge weights when compared to other brass makers.

I would agree with him about being 5% lower in charge weights, which I don't mind, and while I'm not down 5% in velocity when compared to Hornady or Prime, I am around 2.5% to 3% slower. My Hornady load is 42.0 grains of Reloder 16. With a 140 grain projectile, I'm in the 2820 to 2840 fps range, depending on which projectile I'm using. With the Alpha brass, my load is 40.0 grains of Reloder 16, which puts me in the 2750 to 2770 range.
 

ar223

Private
Belligerents
Feb 5, 2012
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64
been working a 6.5cm load with alpha brass settled on 41.0grns of rl16 and 140eldms at 2830fps with 26in barrel shots great hope this helps
 

jsthntn247

Gunny Sergeant
Belligerents
Feb 25, 2009
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Alpha Brass and Peterson's are very similar. I got pressure at 42.5gr of Re16 in Peterson's. 41.3 was the load I settled on at 2815 with a 140 in a 24" barrel.
 

briang7511

O.A.F.
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Jun 10, 2013
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My experience with the alpha brass is that you need to shoot it once before load devlopment. So need 2 loads, 1 for new brass, 1 for fireformed (shot once). Current load is 41.0 gr of RL16 with a 140 eldm at 2810fps. new brass start at 40.0.