20×110mm USN

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

Key specs

Type: Rifle
Origin: United States
Designer: United States Navy
Case type: rimless, bottleneck
Bullet diameter: 19.90 mm
Case length: 109.50 mm
Overall length: 185.00 mm
Typical bullet: 1700 gr
Typical velocity: 1,010 m/s
Typical energy: 56,105 J

Sources

Wikipedia: 20×110mm USN, Wikipedia