Danehunter
Well-Known Member
CMP, what is your 6.5 PRC barrel length? (not including a muzzle brake)
Eric B.
Eric B.
I don't think it is the burn rate that is going to be the problem it is going to be case fill. ball powders are best at 95% or better case fillLet's put this into some perspective: SB 6.5 has a burn speed between H4350 and IMR 4831. Just think about all the cartridges with 30+% more powder capacity than the 6.5PRC that can run those two powders in them.
The 6.5 PRC is nearly identical in capacity to the 6.5-06. SB 6.5 is nearly identical in burn to hybrid 100v. Hodgdon lists multiple powders equal to or faster then Hybrid for the 6.5-06.
I don't think they have time to work up loads for SB6.5 in the PRC yet
Now that I finally have brass I'll let you know
I've since switched from the 122 Lehigh to the 123 Absolute Hammer, I settled on 58.6gr StaBall 6.5 which gives me 3300 fps and sub 1/2 MOA groups. Max was around 59.5gr so I'm a decent bit under that. I tried IMR4955 which got me to 3400 fps with a 0.13 MOA group but that was way too hot despite how good it shot.CMP, Interesting info on StaBall 6.5. Seems it can be used for at least lighter bullets in 6.5 PRC. But with flattened primers beginning to show you may have reached safe pressures for that bullet weight. Those are some very fast velocities.
If you have a good chronometer could you test for 10 rounds of a more accurate load to see what your Standard Deviation number is. The lower the SD the smaller your vertical stringing in a group. SDs in single digits are obviously the best.
I must Stand corrected on this Earlier Post. Looks like the Slower Burning powder is Great with HAMMERS.StaBall 6.5 was developed for the 6.5 Creedmore. Burns to FAST for the 6.5 PRC The Best powder i have found for the prc is RETUMBO or RL-26 however both are very hard to find. good luck
I am also using this with 56.2gr at 3276fpsI've since switched from the 122 Lehigh to the 123 Absolute Hammer, I settled on 58.6gr StaBall 6.5 which gives me 3300 fps and sub 1/2 MOA groups. Max was around 59.5gr so I'm a decent bit under that. I tried IMR4955 which got me to 3400 fps with a 0.13 MOA group but that was way too hot despite how good it shot.
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