The Underwood Ammo Extreme Defense 32 ACP features a 55-grain solid monolithic projectile designed for reliable penetration and expansion with 1050 FPS muzzle velocity and 135 ft-lbs muzzle energy.Underwood Ammo Extreme Defense 32 ACP ammunition55-grain solid monolithic projectile for consistent performanceNickel-plated brass casing for reliable feeding and extraction1050 FPS muzzle velocity and 135 ft-lbs muzzle energy20 rounds per boxEngineered for personal defense applications this premium ammunition delivers dependable terminal performance with the advanced solid monolithic design that provides deep penetration while maintaining structural integrity.