A military small & medium caliber ammunition collection

20 x 102mm United States

20 x 102mm TP M55A1 United States  profile view.20 x 102mm TP M55A1 United States  head view.

Details

TypeTP, M55A1
Projectilesteel, aluminum windscreen, black, 1 copper driving band Projectile Markings: (white ink) 20MM BALL M55A1 LC-16-2 Driving Band Markings: *HVM-20-17 57 20MM M55A2*
Casebrass, knurled choke crimp
Primerelectric, flat, brass, ring crimp
Headstamp[none]