.243 Winchester

1955 · Winchester · 97 firearms in catalog

Also known as: .243 Win

Cartridge specifications

Bullet Diameter6.2 mm (0.244")
Neck Diameter6.86 mm (0.270")
Base Diameter11.94 mm (0.470")
Case Length51.94 mm (2.045")
Overall Length68.83 mm (2.710")
Max Pressure415 MPa (60,191 psi)
Typical Bullet Weight6.48 g (100 gr)
Typical Muzzle Velocity960 m/s (3150 fps)
Typical Muzzle Energy2986 J (2202 ft·lbf)
Primer TypeLarge Rifle
Cartridge TypeRimless Bottleneck
Introduced1955

Firearms chambered in .243 Winchester

Cartridge family

Parent cartridge: .308 Winchester