.510 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: rimless, bottleneck
Bullet diameter: 12.95 mm
Case length: 47.37 mm
Overall length: 84.84 mm
Typical bullet: 750 gr
Typical velocity: 320 m/s
Typical energy: 2,491 J
Parent case: .338 Lapua Magnum

Sources

Wikipedia: .510 Whisper, Wikipedia