Another thing that I do stick with is: when loading for my M1A and AR I take advantage of 'military' primers. Specifically in the M1A. My comprehension is the 'civilian' primers are way too delicate and market the infamous 'slam -fires' This really is an older thread, you might not https://winchester200primers68911.blogtov.com/12318349/the-best-side-of-federal-gm205m-primers