.22 Winchester Automatic

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

Key specs

Type: Rimfire
Origin: United States
Introduced: 1903
Case type: rimmed, straight
Bullet diameter: 5.64 mm
Case length: 16.89 mm
Overall length: 23.24 mm
Typical bullet: 45 gr
Typical velocity: 322 m/s
Typical energy: 151 J

Sources

Wikipedia: .22 Winchester Automatic, Wikipedia