One thing which i do persist with is: when loading for my M1A and AR I take advantage of 'armed forces' primers. Especially in the M1A. My knowledge could be the 'civilian' primers are way too tender and advertise the notorious 'slam -fires' Sam3460: I understand these are sale price https://federalarmatchprimers28284.creacionblog.com/31727775/the-smart-trick-of-federal-large-rifle-magnum-primers-215-that-nobody-is-discussing