.303 Magnum

Photo coming soon: side view on a transparent background, with author and license.

Key specs

Type: Rifle
Origin: United Kingdom
Designer: W. J. Jeffery & Co.
Introduced: 1919
Case type: semi-rimmed, bottleneck
Bullet diameter: 7.92 mm
Case length: 59.69 mm
Overall length: 85.09 mm
Typical bullet: 174 gr
Typical velocity: 869 m/s
Typical energy: 4,135 J
Parent case: .276 Enfield

Sources

Wikipedia: .303 Magnum, Wikipedia

.303 Magnum · Armory Atlas