Mil spec primers

[c east]

YEARS AGO BOUGHT 20,000 primers with a thicker cup made for semi auto ...Started reloading them in 380 auto no problem..... 9mm no problem....223 no problem. but misfires in the carbine...Second hit always fire....Always smack the operating rod to make sure it is in battery.... Do hammer springs in a carbine weaken?.....Charlie........PS .....yes...... I have always used small rifle primers in pistols applications with proven loads..... Have no problem with GI ball or reloads with regular CCI primers

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