2 bore

Schroeder & Hetzendorfer 2 bore metallic cartridge

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

Key specs

Type: Rifle
Origin: United States
Designer: Rudolph Schroeder
Case type: semi-rimmed, straight
Case length: 88.90 mm
Typical bullet: 2500 gr
Typical velocity: 442 m/s
Typical energy: 15,822 J

Sources

Wikipedia: 2 bore, Wikipedia