.280 British

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Key specs

Type: Rifle
Origin: United Kingdom
Designer: British Army
Introduced: 1947
Case type: rimless, bottleneck
Bullet diameter: 7.21 mm
Case length: 43.43 mm
Overall length: 64.52 mm
Typical bullet: 139 gr
Typical velocity: 692 m/s
Typical energy: 2,163 J

Weapons chambered for it 2

Assault riflesEM-2 rifle.280 BritishUnited Kingdom

Battle riflesFN FAL7.62×51mm NATO, .280 BritishBelgium · 1953

Sources

Wikipedia: .280 British, Wikipedia