This weekend i was running a 14.5 DI carbine length gas system with a surefire FA556 suppressor and at least once a mag experienced a blown primer (Top hatted primer). I though ammo problem first but i experienced issues with 55gr PMC, Lake City M855, IMI M855, Hornady 75gr and black hills 77 gr. When i removed the suppressor the problem was not occurring at the same rate. I'm thinking over pressure but thats as far as I've gotten. Any thoughts would be appreciated.
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