8×57 IRS
8×57 JRS · 8mm Mauser peremes
The rimmed version of the 8×57 IS, for break-action rifles. The CIP maximum pressure (3,300 bar) is lower than that of the rimless cartridge.
The 8×57 IRS is the rimmed counterpart of the 8×57 IS, made for break-action guns (double rifles, drillings, combination guns). According to the CIP data sheet its maximum pressure is 3,300 bar, against 3,900 bar for the rimless IS.
The two are therefore not directly comparable: the IRS is loaded more moderately.
Hunting use
Used from break-action guns on red deer, fallow deer, wild boar, mouflon and roe deer. Typical bullet weights are 123–196 grain (8.0–12.7 g). The IS and IRS are not interchangeable; always follow the marking on the rifle.
Suitable game
Big game
Fallow deer
Dama dama
A medium-sized, spotted deer, easily recognised by the buck's palmate antlers.
Big game
Mouflon
Ovis gmelini musimon
A wild sheep introduced to Central Europe from Corsica and Sardinia; the ram's curled horns are a distinctive trophy.
Big game
Red deer
Cervus elaphus
One of Europe's largest deer; the stag's antlers are among the most prized hunting trophies.
Big game
Roe deer
Capreolus capreolus
The most common deer in Hungary; a small, adaptable species living in forests and farmland alike.
Big game
Wild boar
Sus scrofa
A strong, adaptable omnivore; the boar's tusks are a valued trophy, and population control is a key game management task.
Factory loads
No factory loads yet.
Firearms in 8×57 IRS
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