My photo shows a 7,62mm Frangible cartridge head stamped FA 63 next to the 30 cal frangible M22 cartridge of WW2. The M22 was used to train aircraft gunners during WW2 by shooting at a special modified P-63 fighter. The weapon used was a special modified Browning AN M2 machine gun.

My question, why was the 7,62mm Frangible cartridge developed ? it fired a 108 gr bakelite and powered lead bullet at 1320 fps. It was not capable of semi or full auto fire in the 7,62mm weapons unless they had special modificationsAttachment 101497Attachment 101498
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