4.5×26mm MKR

4.5mm MKR (synonyms: 4.5mm Interdynamic, 4.5mm Kjellgren)

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

Key specs

Type: Rimfire
Origin: Sweden
Introduced: 1978
Case type: rimmed, bottleneck
Bullet diameter: 4.63 mm
Case length: 26.10 mm
Overall length: 42.00 mm
Typical bullet: 24.4 gr
Typical velocity: 1,000 m/s
Typical energy: 790 J
Parent case: .22 Winchester Magnum Rimfire

Sources

Wikipedia: 4.5×26mm MKR, Wikipedia