Rimmed version of 8mm Mauser for break-action double rifles and combination guns (Drillings and Vierlings). The standard 8mm caliber for European combination guns and drilling rifles; enormously popular for driven boar hunting across Central and Eastern Europe.
Type: Rifle
Introduced: 1905, Germany
Parent case: 7.92x57mm Mauser
Standardization: CIP
Bullet diameter: 0.323" (8.22 mm)
Case length: 2.244" (57 mm)
Overall length: 3.15" (80.01 mm)
Max pressure: 56,000 PSI
Rim type: Rimmed
Primer: Large Rifle
Typical twist rate: 1:9.84
Muzzle velocity: 2330–2560 fps
Muzzle energy: 2364–3198 ft-lbs
Effective range: 400 yd
Common bullet weights: 196, 220, 224 gr
Primary use: Hunting
Production status: Active
Also known as: 8x57 IRS · 8x57 JS Rimmed · 8.15x46.5R (predecessor)
History: Developed in Germany in the early 1900s to provide a rimmed 8mm cartridge for break-action and combination firearms — the rimless 8x57 JS (standard Mauser) doesn't feed reliably in break-action extractors. The 8x57 JRS is one of the most popular hunting cartridges in Central Europe, particularly in Germany, Austria, Czech Republic, and Poland where driven boar hunting with Drillings (three-barrel…
Notable firearms: Merkel Drilling, Blaser K95 (single barrel), Krieghoff Drilling, Various German combination guns
Similar cartridges: 7.92x57mm Mauser, 9.3x62mm, 9.3x74mmR