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5.56 x 45mm United States

5.56 x 45mm Ball United States F A 7 0 profile view.5.56 x 45mm Ball United States F A 7 0 head view.

Details

TypeBall
ProjectileFMJ, GM, 1 knurled crimping cannelure
Casebrass
Primerpercussion, flat, brass, ring crimp
HeadstampF A 7 0
NotesThis is a control round for induced case failure tests of experimental aluminum-cased 5.56x45mm cartridges. It has an approximately 26mm longitudinal scribe mark from the case head to near the shoulder.