Underwood Ammo brings serious self-defense performance to the 9mm platform with the Xtreme Penetrator(R) 115 Gr Solid Monolithic. Loaded at standard pressure and featuring a CNC-machined solid copper projectile designed by Lehigh Defense this cartridge uses radially-fluted nose geometry to hydraulically pressurize soft tissue on impact - expelling energy outward to create a wide deep permanent wound cavity (PWC) without relying on expansion. The result is consistent barrier-blind terminal performance that rivals or exceeds traditional jacketed hollow points even after passing through intermediate barriers.Caliber: 9mm Luger (Standard Pressure)Bullet Weight: 115 GrBullet Type: Xtreme Penetrator(R) Solid Monolithic Copper (Lehigh Defense)Muzzle Velocity: 1 150 fpsMuzzle Energy: 338 ft-lbsCasing: Nickel-Plated Brass Boxer-PrimedPropellant: Reduced-Flash PowderRounds per Box: 20Rounds per Case: 200 (10 boxes)Country of Origin: USA (Sparta IL)Because the Xtreme Penetrator(R) is non-expanding and non-fragmenting it delivers 100% weight retention and straight-line penetration through soft tissue wallboard sheet metal and automotive glass with no deflection or jacket separation. The standard-pressure designation makes it fully compatible with all 9mm-rated firearms - including compact and subcompact platforms not rated for +P or +P+ loads - making it an excellent everyday carry option. The nickel-plated brass casing enhances feeding reliability corrosion resistance and is fully reloadable. Manufactured in the USA by Underwood Ammo with tight quality controls.