.442 Webley

.442 Webley
.44 Bull Dog (Peters), .442 Webley (UMC) and .442 Revolver (Eley)
Type	Revolver
Place of origin	British Empire
Production history
Designed	1868
Produced	1868–1950s
Specifications
Case type	rimmed, straight
Bullet diameter	.436 in (11.1 mm)
Neck diameter	.47 in (12 mm)
Base diameter	.472 in (12.0 mm)
Rim diameter	.503 in (12.8 mm)
Rim thickness	.033 in (0.84 mm)
Case length	.69 in (18 mm)
Overall length	1.1 in (28 mm)
Rifling twist	1:20
Primer type	Large
Ballistic performance
Bullet mass/type Velocity Energy 200 gr (13 g) (Kynoch ball, factory load) 700 ft/s (210 m/s) 239 ft⋅lbf (324 J) 200 gr (13 g) (Remington factory load) 715 ft/s (218 m/s) 230 ft⋅lbf (310 J)
Source(s): Barnes & Amber 1972

The .442 Webley (also known as the ".442 Revolver Centre Fire" in Great Britain, the .442 Rook long (kangaroo) in Australia, the "10.5x17mmR" or ".442 Kurz" in Europe, and ".44 Webley" or ".442 R.I.C." in the United States)^[1] is a British centrefire revolver cartridge.