Re: 45 LITTLE RED HEADS.....
accurracy.
if i push them any faster, the groups start opening up. i'm a firm believer that i'd rather arc like a rainbow and hit what i'm aiming at rather than flatter and missing. through my set up, this is the magic load / speed.
with the IMR 4064, case capacity starts becoming an issue also. the deeper primer pockets in the pmc brass only gets me to about 44.5 grains before it becomes a compressed powder charge, any other brass 45.5 grains. besides the extra "abuse" and pressures, it's not worth it to me because i start losing accurracy.
even with other powders and oal's, for some reason this is the formula that puts one round in another with that rifle. same goes for my 165 sst's, 2590 fps.
it just likes slow and heavy.