A military small & medium caliber ammunition collection

20 x 102mm United States

20 x 102mm Dummy  United States  profile view.20 x 102mm Dummy  United States  head view.

Details

TypeDummy
Projectilesteel, aluminum windscreen, blue, 1 copper driving band Driving Band Markings: ZEL-4-13-65-20MM-M55A2
Casebrass, segmented choke crimp, 1 hole
Primerelectric (fired), flat, brass, ring crimp
Headstamp[none]
NotesWritten in black ink on case: DUMMY TP CTG. MADE UP AT YUMA PROVING GROUND SMALL ARMS TEST DIRECTORATE CA. 1975.