Hey guys, a friend of mine just inherited a Belgium made Browning BAR chambered in 7mm Rem Mag. I have loaded for several bolt action 7mm's in the past but never a semi-auto. What powders are the best the too use? I know about using the faster burning powders to help with the bolt cycling, but which ones are the best. Is RL-22 fast burning enough,that is the powder that I have always had the best luck using in the past for the 7mm's.
Any help or load data will be greatly appreciated. Nebraska deer season is right around the corner and I would like to get all the bugs worked out before then.