A military small & medium caliber ammunition collection

.50 BMG United States

.50 BMG AP (Plate Test)  United States F A 53 profile view..50 BMG AP (Plate Test)  United States F A 53 head view.

Details

TypeAP (Plate Test)
ProjectileFMJ, GM, black over silver tip, 1 smooth crimping cannelure
Casebrass, taper crimp
Primerpercussion, flat, brass, 3-stake crimp, red annulus
HeadstampF A 53
NotesThis is a color code error and is reportedly the only known year/headstamp for this color code.