DoubleTap Tactical Features The .357 Sig caliber is a powerful and versatile cartridge offering a balance of speed and stopping power. The Barnes TAC-XP bullet is a lead-free design making it an environmentally friendly option without compromising on performance. The bullet is engineered to deliver rapid expansion and deep penetration which is crucial in self-defense scenarios. With a muzzle velocity of 1475 feet per second and a muzzle energy of 555 ft lbs these rounds provide excellent ballistic performance. This combination ensures that the bullet can effectively neutralize threats providing peace of mind for home defense. DoubleTap Tactical Specifications Brand: DoubleTap Ammunition Category: Centerfire Handgun Rounds Model: Tactical Caliber: .357 Sig Rounds Per Box: 20 Casing Material: Brass Muzzle Energy: 555 ft lbs Muzzle Velocity: 1475 fps Application: Home Defense Bullet Type: Barnes TAC-XP Lead Free Bullet Weight: 115 gr