.20 BR

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

Key specs

Type: Rifle
Origin: United States
Case type: rimless, bottleneck
Bullet diameter: 5.18 mm
Case length: 38.99 mm
Typical bullet: 40 gr
Typical velocity: 1,219 m/s
Typical energy: 1,925 J
Parent case: .22 BR Remington

Sources

Wikipedia: .20 BR, Wikipedia

.20 BR · Armory Atlas