Something which i do persist with is: when loading for my M1A and AR I take advantage of 'military' primers. Particularly in the M1A. My being familiar with may be the 'civilian' primers are far too delicate and boost the infamous 'slam -fires' This can be an more mature thread, https://winchesterprimersuk28493.bloggerswise.com/38915238/the-smart-trick-of-federal-large-rifle-magnum-primers-215-that-nobody-is-discussing