.450 Marlin

.450 Marlin
.450 Marlin, left and .458 Winchester Magnum, right
Type	Rifle
Place of origin	United States
Production history
Designer	Hornady and Marlin Firearms
Designed	2000
Manufacturer	Hornady
Produced	2000–present
Specifications
Parent case	.458×2-inch American[1]
Case type	Belted, straight
Bullet diameter	.458 in (11.6 mm)
Base diameter	.5121 in (13.01 mm)
Rim diameter	.528 in (13.4 mm)
Case length	2.10 in (53 mm)
Overall length	2.55 in (65 mm)
Rifling twist	1:20 in (508 mm)
Primer type	Large rifle
Maximum pressure	43,500 psi (300 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 430 gr (28 g) LBT-LFN (Lead Long Flat Nose) 1,900 ft/s (580 m/s) 3,446 ft⋅lbf (4,672 J) 405 gr (26 g) JFN (Copper Jacketed Flat Nose) 1,975 ft/s (602 m/s) 3,507 ft⋅lbf (4,755 J) 350 gr (23 g) JFN 2,100 ft/s (640 m/s) 3,427 ft⋅lbf (4,646 J) 325 gr (21 g) FTX (Hornady Flex Tip Expanding LEVERevolution) 2,225 ft/s (678 m/s) 3,572 ft⋅lbf (4,843 J)
Test barrel length: (SAAMI) 24 inches (610 mm) Source(s): Buffalo Bore Ammunition,[2] Hornady Ammunition,[3]

The .450 Marlin is a firearms cartridge designed as a modernized equivalent to the .45-70 cartridge. It was designed by a joint team of Marlin and Hornady engineers headed by Hornady's Mitch Mittelstaedt,^[4] and was released in 2000, with cartridges manufactured by Hornady and rifles manufactured by Marlin, mainly the Model 1895M levergun. The Browning BLR is also now available in .450 Marlin chambering, as is the Ruger No. 1. Marlin ceased manufacture of the 1895M rifle in 2009. In October 2022 it was rumored that Ruger Firearms, the new owner of Marlin Firearms, may be reintroducing the 450 Marlin in their Model 1895 guide gun, but this has not been confirmed by Marlin or Ruger.