.25 cal Impact M3 grouping

I have 2 rigs that are somewhat fussy, one like Zans 44 grain BTHP and the other likes Nicks "NSA" 43 grain HPFB. Both rifles average right at 980 fps and still maintain a sub moa out past 200 yards. I'm really wanting to know is what reg pressures are being used, grain of slug, and FPS; I believe I'm on the right road in my search for ultimate accuracy and power. But to be sure, I need to know what other shooters have tried or what they're doing.
 
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