12.7×99 mm M1 Ball

NAME – 12.7×99 mm M1 Ball

NAME (COMMON) – .50 Browning M1 Ball

TYPE – Metallic Centerfire

YEAR OF INTRODUCTION – 1931

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 – 45.94 g (709 grains)

POWDER WEIGHT – 16.20 g (250 grains)

CASING WEIGHT – 54.63 g (843 grains)

TOTAL ROUND WEIGHT – 116.77 (1,802 grains)

MUZZLE VELOCITY – 823 m/s (2700 fps)

NOMINAL BARREL LENGTH – 91.4 cm (36 in)

MUZZLE ENERGY – 15,563 j (11,479 ft/lb)

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

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