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A military small & medium caliber ammunition collection

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20 x 102mm United States

20 x 102mm Proof M54E2 United States profile view.20 x 102mm Proof M54E2 United States head view.

Details

TypeProof, M54E2
Projectilesteel, black, 1 copper driving band Projectile Markings: (white ink) 20MM HPT M54E2 LC-7-2 Driving Band Markings: *LC-3-3*57*20MM*M54E2
Casebrass, knurled choke crimp
Primerelectric, flat, brass, ring crimp, black annulus
Headstamp[none]
NotesProjectile appears to have been pulled to dump the powder charge, then re-crimped.