.44 Henry

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.44 Henry
.44 Henry cartridges
Type	Rifle and handgun
Place of origin	United States
Production history
Designer	New Haven Arms Company
Designed	1860[1]
Produced	1860–1920s/1930s
Specifications
Case type	Rimmed, straight
Bullet diameter	.446 in (11.3 mm)
Neck diameter	.434 in (11.0 mm)
Base diameter	.441 in (11.2 mm)
Rim diameter	.518 in (13.2 mm)
Rim thickness	.062 in (1.6 mm)
Case length	.903 in (22.9 mm)
Overall length	1.345 in (34.2 mm)
Primer type	Rimfire
Maximum pressure (CIP)	14,500 psi (100 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 200 gr (13 g) lead 1,125 ft/s (343 m/s) 568 ft⋅lbf (770 J)

The .44 Henry, also known as the .44 Henry Flat, the .44 Rimfire, the .44 Long Rimfire, and the 11x23mmRF (11x23mm Rimmed) in Europe,^[2] is a rimfire rifle and handgun cartridge featuring a .875 in (22.2 mm)-long brass or copper case. The round has a total overall length of 1.345 in (34.2 mm), with a 200 or 216 gr (12.96 or 14.00 g; 0.46 or 0.49 oz) .446 in (11.3 mm)-diameter cast solid-lead heeled bullet. The original propellant load is 26 to 28 gr (1.68 to 1.81 g; 0.06 to 0.06 oz) of black powder. The round has a muzzle velocity of approximately 1,125 ft/s (343 m/s), giving a muzzle energy of 568 foot-pounds (770 joules).