Experience superior performance with Underwood Ammo Xtreme Penetrator Handgun Ammunition, designed for 10mm Auto firearms. This 140 gr solid bullet achieves an impressive velocity of 1500 fps, delivering 700 ft lbs of muzzle energy. Made from copper and encased in nickel-plated brass, this lead-free ammunition is perfect for hunting and self-defense applications. Each box contains 20 rounds, engineered for reliability and effectiveness. Choose Underwood for the ultimate in handgun ammunition performance.