.500 Nitro Express

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.500 Nitro Express
.500 Nitro Express round
Type	Rifle
Place of origin	United Kingdom
Production history
Designer	Westley Richards
Designed	1890
Produced	1890–present
Specifications
Parent case	.500 Black Powder Express
Case type	Rimmed, straight
Bullet diameter	.510 in (13.0 mm)
Neck diameter	.532 in (13.5 mm)
Base diameter	.574 in (14.6 mm)
Rim diameter	.655 in (16.6 mm)
Rim thickness	.040 in (1.0 mm)
Case length	3.00 in (76 mm)
Overall length	3.75 in (95 mm)
Case capacity	138.0 gr H2O (8.94 cm3)
Rifling twist	1-15 in (381 mm)
Primer type	Boxer
Maximum pressure	40,000 psi (280 MPa)
Ballistic performance
Bullet mass/type Velocity Energy 570 gr (37 g) (factory load, cordite) 2,150 ft/s (660 m/s) 5,851 ft⋅lbf (7,933 J) 440 gr (29 g) (Lyman 515141) 1,560 ft/s (480 m/s) 2,378 ft⋅lbf (3,224 J) 570 gr (37 g) (smokeless, Kynoch) 2,150 ft/s (660 m/s) 5,851 ft⋅lbf (7,933 J)
Source(s): Barnes & Amber 1972

The .500 Nitro Express is a rifle cartridge designed for hunting large and dangerous game animals in Africa and India.^[1] This cartridge was primarily designed for use in double rifles though various single shots were produced on the Farquarson action and at least one major company (Heym) produced it in bolt-action configuration. It was commonly available in two lengths: a 3.00 in (76 mm) and a 3.25 in (83 mm) version.