A military small & medium caliber ammunition collection

20 x 102mm United States

20 x 102mm HEI (Inert)  United States  profile view.20 x 102mm HEI (Inert)  United States  head view.

Details

TypeHEI (Inert)
Projectilesteel, steel windscreen, yellow, 1 copper driving band Projectile Markings: (black ink) INERT PORJ CHARGE PROPELLANT TEST Driving Band Markings: ..ZEL-10-17-69-M56A3
Casebrass, choke crimp
Primerelectric, flat, brass, ring crimp, red annulus
Headstamp[none]