NAME – 12.7x22mmR

NAME (COMMON) – .50 Remington Navy

TYPE – Rimmed centerfire

YEAR OF INTRODUCTION – 1868

COUNTRY OF ORIGIN – USA

CASE TYPE – Rimmed straight

CARTRIDGE LENGTH – 32.5 mm (1.28 in)

CASING LENGTH – 21.8mm (0.860 in)

CASE HEAD DIAMETER – 14.27 mm (0.562 in)

CASE RIM DIAMETER – (0.642 in)

BULLET TYPE – Round nosed lead

BULLET DIAMETER – 12.95 mm (0.510 in)

BULLET WEIGHT – 19.63 g (303 grains)

POWDER WEIGHT – 1.56 g (24 grains) Black powder

CASING WEIGHT – 6.09 g (94 grains) – Includes wads (2.6 grains) and bullet lubricant (0.9 grains)

TOTAL ROUND WEIGHT – 27.54 g (425 grains)

MUZZLE VELOCITY – 191 m/s (625 fps)

NOMINAL BARREL LENGTH – 17.8 cm (7 in)

MUZZLE ENERGY – 356 j (263 ft/lb)

     This is one of the largest pistol cartridges ever used in the United States military. It is not the most powerful since it was used in the days of black powder loadings only, but it was the first 12.7mm (.50 caliber) US pistol round. The Navy cartridge case has a thin rim while the slightly later Army round has a much thicker rim. This prevents the Army round from being chambered in the Navy pistol. The Navy round will chamber and fire in either the Navy or 1871 Army weapon.