The Underwood Ammo Xtreme Penetrator delivers exceptional performance in 357 Magnum with a 140-grain solid monolithic projectile designed for maximum penetration and reliability.Underwood Ammo Xtreme Penetrator 357 Mag ammunition140 grain solid monolithic projectile for superior penetrationHigh-performance specs: 1550 FPS muzzle velocity 747 ft lbs muzzle energyPremium nickel-plated brass casing for reliable feeding and extraction20 rounds per box for extended shooting sessionsEngineered for serious shooters who demand consistent accuracy and penetration performance this premium ammunition is ideal for hunting self-defense and precision shooting applications.