Prophet River Firearms

Please note that due to shipping restrictions all ammunition, primers and gun powders are not available for online purchase. Please contact our store and we would be happy to provide you with a quote and process your order manually for any of these items.

The 8×57 IRS cartridge was born at the same time as its rimless brother 8×57 IS. The original idea was to develop a similar cartridge for the breech break combination guns like double rifles, drillings and vierlings. The other difference to the 8 x 57 IS round is the lower maximum pressure level which has been set for this caliber to 330 MPa. Throughout the years, Lapua’s 8×57 IRS ammunition has earned its success and reputation as a powerful wild boar stopper in driven hunts. The 8×57 IRS cartridge comes factory loaded with the 11.7 g / 180 gr Naturalis^® bullet.

Caliber
8×57 IRS

Bullet
Naturalis

Product no.
N318010

Bullet Code
N559

Bullet weight
11.7 g (180 gr)

Bullet type
Lead-free copper

Muzzle velocity
800 m/s (2625 fps)

Purpose
Hunting

Twist rate
1-9.5''

BC G1
0.248

BC G7
–