Big-bore-bob
Member
Hello all, I'm getting higher than book velocity on some uspsa loads I made up for this weekend using once fired brass, 230gr hornady HAP, 5.4gr hp38, winchester lpp, coal 1.235, crimp .4695- .4705. Avg 862fps, SD 14, ES 48. Loads are very accurate and recoil is lighter than factory wwb. Im seeing what may be slight flattening of the primers. Any idea what could cause this? I load 5.5gr all the time for fmj target loads and my velocity averages 820 with that load. The gun used is a hk usp expert 5.2in barrel.
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