.300 Winchester Magnum

1963 · Winchester · 138 firearms in catalog

Also known as: .300 Win Mag, .300 WM

Cartridge specifications

Bullet Diameter7.82 mm (0.308")
Neck Diameter8.61 mm (0.339")
Base Diameter13.03 mm (0.513")
Case Length66.55 mm (2.620")
Overall Length84.84 mm (3.340")
Max Pressure430 MPa (64,000 psi)
Typical Bullet Weight11.66 g (180 gr)
Typical Muzzle Velocity900 m/s (2953 fps)
Typical Muzzle Energy4722 J (3483 ft·lbf)
Primer TypeLarge Rifle Magnum
Cartridge TypeBelted
Introduced1963

Firearms chambered in .300 Winchester Magnum