.444 Marlin

.444 Marlin
.444 Marlin (center) with .308 Win (left) and .45-70 (right)
Type	Rifle
Place of origin	United States
Production history
Designer	Marlin, Remington Arms
Designed	1964
Manufacturer	Remington
Produced	1964–present
Specifications
Case type	Rimmed, straight
Bullet diameter	.429 in (10.9 mm)
Neck diameter	.453 in (11.5 mm)
Base diameter	.4706 in (11.95 mm)
Rim diameter	.514 in (13.1 mm)
Rim thickness	.063 in (1.6 mm)
Case length	2.225 in (56.5 mm)
Overall length	2.55 in (65 mm)
Rifling twist	1⁄38 in (0.67 mm) (microgroove) or 1⁄20 in (1.3 mm) (Ballard cut)
Primer type	Large rifle
Maximum pressure (CIP)	51,500 psi (355 MPa)
Maximum CUP	44,000 CUP
Ballistic performance
Bullet mass/type Velocity Energy 240 gr (16 g) SP 2,350 ft/s (720 m/s) 2,942 ft⋅lbf (3,989 J) 265 gr (17 g) FP 2,200 ft/s (670 m/s) 2,849 ft⋅lbf (3,863 J) 300 gr (19 g) HP 2,000 ft/s (610 m/s) 2,665 ft⋅lbf (3,613 J)
Test barrel length: 24 in Source(s): Hornady [1] / Remington [2]

The .444 Marlin (10.9×57mmR) is a rifle cartridge designed in 1964 by Marlin Firearms and Remington Arms. It was designed to fill the gap left when the older .45-70 cartridge was not available in new lever-action rifles; at the time it was the largest lever-action cartridge available.^[1] The .444 resembles a lengthened .44 Magnum and provides a significant increase in velocity. It is usually used in the Marlin 444 lever-action rifle. Currently, Marlin, now owned by Ruger Firearms, does not offer the .444 chambering in any of their rifles. It remains to be seen if they will bring the chambering back into production.