MIL-C-60617A, MILITARY SPECIFICATION: CARTRIDGE, 7.62MM : NATO, ARMOR PIERCING, M61 (31 JUL 1968)
MIL-C-60617A, MILITARY SPECIFICATION: CARTRIDGE, 7.62MM : NATO, ARMOR PIERCING, M61 (31 JUL 1968)., This specification covers Cartridge, 7.62MM: NATO, Armor Piercing,
M61 for use in 7.62mm weapons.