.22 Remington Automatic

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

Key specs

Type: Rimfire
Origin: United States
Introduced: 1916
Case type: rimmed, straight
Bullet diameter: 5.66 mm
Case length: 16.84 mm
Overall length: 23.37 mm
Typical bullet: 45 gr
Typical velocity: 290 m/s
Typical energy: 122 J

Sources

Wikipedia: .22 Remington Automatic, Wikipedia