8.5mm Mars

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

Key specs

Type: Pistol
Origin: United Kingdom
Introduced: 1899
Case type: rimless, bottleneck
Bullet diameter: 8.41 mm
Case length: 26.00 mm
Overall length: 36.80 mm
Typical bullet: 139 gr
Typical velocity: 472 m/s
Typical energy: 1,003 J

Sources

Wikipedia: 8.5mm Mars, Wikipedia