Ammo Specifications Caliber: 10mm Auto Bullet Weight: 180 gr Bullet Style: Trophy Bonded JSP Quantity: 20/Box Federal Premium Vital-Shok Trophy Bonded 10mm Auto is a full-power load that restores the capabilities of the cartridge. With a muzzle velocity of 1,275 fps, the new 180-grain jacketed soft point (JSP) shoots flat and packs a powerful punch in semi-automatic pistols. With ballistics that fall between those of the 357 Magnum and 41 Magnum, the load gives hunters the power to take down deer, bears or hogs.