.450 Nitro Express

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.450 Nitro Express
Type	Rifle cartridge
Place of origin	United Kingdom
Production history
Designer	John Rigby & Company
Designed	1898
Produced	1898–present
Specifications
Parent case	.450 Black Powder Express
Case type	Rimmed, straight
Bullet diameter	.458 in (11.6 mm)
Neck diameter	.481 in (12.2 mm)
Base diameter	.545 in (13.8 mm)
Rim diameter	.624 in (15.8 mm)
Rim thickness	.042 in (1.1 mm)
Case length	3.25 in (83 mm)
Overall length	3.95 in (100 mm)
Case capacity	130.0 gr H2O (8.42 cm3)
Rifling twist	1-15 in (381 mm)
Primer type	Boxer/Berdan
Maximum pressure	44,237 psi (305.00 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 465 gr (30 g) Lead 2,150 ft/s (660 m/s) 4,770 ft⋅lbf (6,470 J) 480 gr (31 g) Lead 2,150 ft/s (660 m/s) 4,930 ft⋅lbf (6,680 J) 500 gr (32 g) 2,150 ft/s (660 m/s) 5,133 ft⋅lbf (6,959 J)
Source(s): "Cartridges of the World" 500gr load specified by ADI-Powders[1]

.450 Nitro Express also known as the .450 Nitro Express 31⁄4-inch is a rifle cartridge designed for hunting dangerous game such as elephant, rhino, cape buffalo, lion, and leopard. This cartridge is used almost exclusively in double rifles for hunting in the tropics or hot climates in general and is associated with the Golden Age of African safaris and Indian shikars.