Underwood Ammo Xtreme Penetrator .357 Magnum 140gr ammunition features a solid copper, lead-free bullet and is designed for deep penetration and consistent performance. This cartridge is suitable for self-defense, hunting, and target practice, and is packaged in reloadable brass cases. With a muzzle velocity of 1,550 feet per second and energy of 747 foot-pounds, it represents Underwoods commitment to precision and power. Solid copper, lead-free Xtreme Penetrator bullet design Brass cases are reloadable for added convenience Delivers 1,550 fps muzzle velocity with 747 ft-lbs energy This Underwood .357 Magnum ammo is designed for shooters seeking durable, high-performance rounds with advanced bullet technology. Its deep-penetrating capabilities and consistent construction make it a reliable option for a variety of shooting needs.