8×57 IRS loaded with the 180 gr Naturalis lead-free copper bullet – The wild boar stopper in driven hunts

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 180 gr Naturalis® bullet.

Caliber: 8x57 IRS
Bullet: Naturalis
Product no.: N318010
Bullet weight: 180 gr
Bullet type: Lead-free copper
Muzzle velocity: 805 m/s (2641 fps)
Purpose: Hunting
Twist rate: 1-9.5''
BC G1: 0.357
BC G7: 0.179