.500/450 Magnum Black Powder Express

< .500
.500/450 Magnum Black Powder Express
TypeRifle
Place of originUnited Kingdom
Production history
Produced1870s
Specifications
Parent case.500 Black Powder Express
Case typeRimmed, bottleneck
Bullet diameter.458 in (11.6 mm)
Neck diameter.479 in (12.2 mm)
Shoulder diameter.500 in (12.7 mm)
Base diameter.570 in (14.5 mm)
Rim diameter.644 in (16.4 mm)
Case length3.25 in (83 mm)
Overall length3.91 in (99 mm)
Case capacity141.4 gr H2O (9.16 cm3)
Primer typeKynoch # 40
Ballistic performance
Bullet mass/type Velocity Energy
325 gr (21 g) 1,950 ft/s (590 m/s) 2,745 ft⋅lbf (3,722 J)
365 gr (24 g) 1,875 ft/s (572 m/s) 2,850 ft⋅lbf (3,860 J)
Source(s): "Cartridges of the World"

The .500/450 3+1⁄4-inch Magnum Black Powder Express, is a centerfire rifle cartridge developed in Britain.

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