Grandson was shooting a 9mm AR rapid fire when the last round (15th?) blew the mag out. An inspection showed no external damage, but when the bolt was removed what was left of the case head was still stuck to the bolt face. Looking at spent brass showed several with bulges near the case head. We called it a day with that rifle and later ran the remaining loaded rounds in a Wilson case gauge. lots would not seat below flush. FWIW this is remanufactured ammo from a reputable firm.will PM anyone who wants to know the name. This obviously is bad juju, but can anyone think of another cause for the bulges or separated case?Barrel was checked with Go/No go and passed.
