.17 HM2

.17 Hornady Mach 2

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

Key specs

Type: Rimfire
Origin: United States
Designer: Hornady
Introduced: 2004
Case type: rimmed, bottleneck
Bullet diameter: 4.37 mm
Case length: 18.14 mm
Overall length: 25.40 mm
Typical bullet: 17 gr
Typical velocity: 640 m/s
Typical energy: 225 J

Sources

Wikipedia: .17 HM2, Wikipedia