NAME – 12.7×99 mm M2 Ball

NAME (COMMON) – .50 Browning M2 Ball

TYPE – Metallic Centerfire

YEAR OF INTRODUCTION – 1941

COUNTRY OF ORIGIN – USA

CASE TYPE – Rimless bottleneck

CARTRIDGE LENGTH – 137.7 mm (5.42 in)

CASING LENGTH – 99 mm (3.90 in)

CASE HEAD DIAMETER – 20.42 mm (0.804 in)

CASE RIM DIAMETER – 20.42 mm (0.804 in)

BULLET TYPE – Mild steel-cored full jacketed Ball

BULLET DIAMETER – 12.95 mm (0.510 in)

BULLET WEIGHT – 46.53 g (718 grains)

POWDER WEIGHT – 16.20 g (250 grains)

CASING WEIGHT – 55.08 g (850 grains)

TOTAL ROUND WEIGHT – 119.04 g (1837 grains)

MUZZLE VELOCITY – 91.4 cm (36 in) barrel – 867 m/s (2,845 fps)

MUZZLE VELOCITY – 114.3 cm (45 in) barrel – 895 m/s (2,935 fps)

NOMINAL BARREL LENGTH – 36 or 45 in

MUZZLE ENERGY – 91.4 cm (36 in) barrel – 17,011 j (12,547 ft/lb)

MUZZLE ENERGY – 114.3 cm (45 in) barrel – 18,105 j (13,353 ft/lb)

WEIGHT OF M7 110-rd Fabric Ammunition Belt – 0.20 kg (7 oz) EMPTY

WEIGHT OF 1 M2 50 cal Link 17.30 g (267 grains) EMPTY, 1.72 kg (3 LB 12 oz) per 100 EMPTY