.44 Colt

.44 Colt
Benet primed .44 Colt & Remington, .44 Colt and .44 Remington.
Type	Revolver
Place of origin	United States
Service history
In service	1871–1873
Used by	United States Army
Production history
Produced	1871–1940
Specifications
Case type	rimmed straight
Bullet diameter	.451 in (11.5 mm)
Base diameter	.456 in (11.6 mm)
Rim diameter	.483 in (12.3 mm)
Case length	1.10 in (28 mm)
Overall length	1.50 in (38 mm)
Rifling twist	1:16 in (410 mm)
Primer type	large pistol
Ballistic performance
Bullet mass/type Velocity Energy 225 gr (15 g) (U.S. Army black powder load) 640 ft/s (200 m/s) 207 ft⋅lbf (281 J) 225 gr (15 g) (factory load) 640 ft/s (200 m/s) 207 ft⋅lbf (281 J) 210 gr (14 g) (factory load) 660 ft/s (200 m/s) 206 ft⋅lbf (279 J) 210 gr (14 g) (original factory black powder load) 660 ft/s (200 m/s) 206 ft⋅lbf (279 J) 210 gr (14 g) (smokeless, Lyman #429185) 650 ft/s (200 m/s) 197 ft⋅lbf (267 J)
Source(s): Barnes & Amber 1972

The .44 Colt / 11.5x28mmR is an American centerfire revolver cartridge that was produced commercially from 1871 to 1940.^[1]