Winchester Defender Pistol Ammo in .40 S&W is engineered to deliver superior performance in personal defense situations. Loaded with a 165-grain bonded jacketed hollow point bullet, it expands up to 1.5 times its original diameter for consistent terminal performance. The proprietary bonding process fuses the jacket to the lead core for improved penetration and weight retention. Designed for low flash in reduced-light environments, it ensures visibility and control. With a muzzle velocity of 1140 fps and energy of 476 ft-lbs, this load provides reliable, threat-stopping power when it matters most.