BrentM
Well-Known Member
It's a just a simple combination of issues that creates the difference. 1x fired brass vs 0x. Powder. Neck tension. I personally would not be concerned with duplicating velocity but I understand it is at least a benchmark. Perhaps check the load velocity that is semi is close and tweak seating depth. I'd guess you'll find a velocity node and accuracy node somewhere in there without a lot of wasted components.