Underwood Ammo Xtreme Penetrator 9mm Luger 115gr features a solid copper projectile engineered for reliable, deep penetration. Manufactured by Underwood Ammo, this cartridge uses boxer-primed, reloadable nickel-plated brass cases and provides supersonic performance at the listed velocity. Every box contains 20 rounds for use in 9mm Luger firearms. 115-grain solid copper Xtreme Penetrator bullet design Nickel-plated brass case is reloadable Muzzle velocity approximately 1150 feet per second Underwood Xtreme Penetrator is lead-free, designed for consistent performance, and intended for self-defense scenarios. This ammunition is suitable for shooters seeking deep penetration with tested reliability.