.458 Winchester Magnum

1956 · Winchester · 2 firearms in catalog

Also known as: .458 Win Mag

Cartridge specifications

Bullet Diameter11.63 mm (0.458")
Neck Diameter12.09 mm (0.476")
Base Diameter13.03 mm (0.513")
Case Length63.5 mm (2.500")
Overall Length82.55 mm (3.250")
Max Pressure434 MPa (62,000 psi)
Typical Bullet Weight32.4 g (500 gr)
Typical Muzzle Velocity640 m/s (2100 fps)
Typical Muzzle Energy6636 J (4894 ft·lbf)
Primer TypeLarge Rifle Magnum
Cartridge TypeBelted
Introduced1956

Firearms chambered in .458 Winchester Magnum