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The only American military ammo to use non corrosive primers until the mid 50's was the M1 carbine.
Quote: Originally Posted by TDH The only American military ammo to use non corrosive primers until the mid 50's was the M1 carbine. TDH-- The US army was afraid that corrosive priming would seize up the gas piston due it being stacked into the gas piston nut.