.41 Remington Magnum

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.

.41 Remington Magnum
.41 Remington Magnum cartridge, scale in cm
TypeRevolver
Place of originUnited States
Production history
DesignerElmer Keith
Bill Jordan
Skeeter Skelton
Designed1963
ManufacturerRemington Arms
Produced1964
Specifications
Parent caseNone
Case typeRimmed, 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 length1.290 in (32.8 mm)
Overall length1.590 in (40.4 mm)
Case capacity34 gr H2O (2.2 cm3)
Rifling twist1-1812 in
Primer typeLarge pistol
Maximum pressure36,000 psi (250 MPa)
Maximum CUP40,000 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
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