.41 Remington Magnum

.41 Remington Magnum
.41 Remington Magnum cartridge, scale in cm
Type	Revolver
Place of origin	United States
Production history
Designer	Elmer Keith Bill Jordan Skeeter Skelton
Designed	1963
Manufacturer	Remington Arms
Produced	1964
Specifications
Parent case	None
Case type	Rimmed, straight
Bullet diameter	.410 in (10.4 mm)
Neck diameter	.434 in (11.0 mm)
Base diameter	.434 in (11.0 mm)
Rim diameter	.492 in (12.5 mm)
Rim thickness	.060 in (1.5 mm)
Case length	1.290 in (32.8 mm)
Overall length	1.590 in (40.4 mm)
Case capacity	34 gr H2O (2.2 cm3)
Rifling twist	1-181⁄2 in
Primer type	Large pistol
Maximum pressure (CIP)	44,000 psi (300 MPa)
Maximum pressure (SAAMI)	36,000 psi (250 MPa)
Maximum CUP	40,000 CUP
Ballistic performance
Bullet mass/type Velocity Energy 170 gr (11 g) JHP Cor-Bon 1,275 ft/s (389 m/s) 614 ft⋅lbf (832 J) 210 gr (14 g) JHP 1,560 ft/s (480 m/s) 1,135 ft⋅lbf (1,539 J) 240 gr (16 g) FMJ+P Winchester 1,250 ft/s (380 m/s) 833 ft⋅lbf (1,129 J) 265 gr (17 g) HP-GC Buffalo Bore Heavy 1,350 ft/s (410 m/s) 1,072 ft⋅lbf (1,453 J)
Test barrel length: 6.5 inches (170 mm) Source(s): Ballistics by the inch[1][2]

The .41 Remington Magnum, also known as .41 Magnum or 10.4×33mmR (as it is known in unofficial metric designation), is a center fire firearms cartridge primarily developed for use in large-frame revolvers, introduced in 1964 by the Remington Arms Company, intended for hunting and law enforcement purposes.