.55 Boys

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

Key specs

Type: Rifle
Origin: United Kingdom
Introduced: 1937
Case type: belted, bottleneck
Bullet diameter: 14.30 mm
Case length: 97.79 mm
Overall length: 133.43 mm
Typical bullet: 946 gr
Typical velocity: 760 m/s
Typical energy: 17,726 J
Parent case: 13.2×99mm Hotchkiss Long

Weapons chambered for it 1

Sniper riflesBoys anti-tank rifle.55 BoysUnited Kingdom · 1937

Sources

Wikipedia: .55 Boys, Wikipedia