.242 Rimless Nitro Express

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

Key specs

Type: Rifle
Origin: United Kingdom
Designer: Kynoch
Introduced: 1923
Case type: rimless, bottleneck
Bullet diameter: 6.43 mm
Case length: 60.45 mm
Overall length: 81.28 mm
Typical bullet: 100 gr
Typical velocity: 853 m/s
Typical energy: 2,359 J

Sources

Wikipedia: .242 Rimless Nitro Express, Wikipedia