.500 Whisper

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

Key specs

Type: Rifle
Origin: United States
Designer: SSK Industries
Case type: belted, bottleneck
Bullet diameter: 12.95 mm
Typical bullet: 750 gr
Typical velocity: 320 m/s
Typical energy: 2,491 J
Parent case: .378 Weatherby Magnum

Sources

Wikipedia: .500 Whisper, Wikipedia