The Underwood Ammo 357 Magnum ammunition features 158 grain jacketed hollow point bullets designed for superior expansion and stopping power with 1500 FPS muzzle velocity and 790 ft lbs muzzle energy.Underwood Ammo 357 Magnum ammunition158 grain jacketed hollow point (JHP) projectileNickel-plated brass casing for reliable extraction20 rounds per box1500 FPS muzzle velocity790 ft lbs muzzle energyIdeal for self-defense hunting and tactical applications where maximum terminal performance and reliability are essential.