I agree with Beans on all 3 powders.

AA2230 for my M4, shooting 62 gr. M855's and Sierra 65 BT's. Meters like water through a progressive (I now hate that word) press.

RE15 for my Remington 700 VTR, shooting 70 gr. Bergers.

Varget for my custom Kimber shooting 80gr. Bergers.

S/F,

RAS