Prvi Partizan PPU GROM (Thunder) Line 7×57 (7mm Mauser) 158Gr GTB 20 Round Box


Analyzing your needs and wishes, we designed a new bullet type, Grom; a mostly of copper alloy bullet with a small lead core.  The research confirmed our efforts to offer you a high performance bullet type with an optimum balance of controlled and reliable expansion, deep penetration, maximum weight retention, good accuracy and satisfying energy.  GROM Line ammunition is intended for big game hunting.



Bullet Type Grom Thunder Bullet
Bullet Weight (g) 10.20

Ballistics (610mm Test Barrel):

Velocity (m/s):

Muzzle 50 m 100 m 150 m 200 m 250 m 300 m
750 715 680 647 614 582 552

Energy (J):

Muzzle 50 m 100 m 150 m 200 m 250 m 300 m
2880 2614 2368 2141 1931 1736 1559

Trajectory (cm):

Muzzle 50 m 100 m 150 m 200 m 250 m 300 m
-5 1.7 3.5 0 -9.2 -24.6 -47.8

Additional Information:


Manufacturers, importers, suppliers, and distributors may make changes to their products without fanfare. Such changes can lead to discrepancies between the advertised product and the actual product in inventory. While International Shooting Supplies Ltd. endeavors to correctly describe the actual product in inventory, we will not be responsible for unintentional inaccuracies in text and images of the advertised product.



7×57 Mauser


Prvi Partisan

Shopping Cart

Please note: International Shooting Supplies does not ship to addresses outside Canada.