.500 Maximum

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

Key specs

Type: Pistol
Origin: United States
Designer: John Linebaugh
Case type: rimmed
Bullet diameter: 13.00 mm
Case length: 40.89 mm
Typical bullet: 400 gr
Typical velocity: 429 m/s
Typical energy: 2,382 J

Sources

Wikipedia: .500 Maximum, Wikipedia
Wikipedia: List of handgun cartridges, Wikipedia