Engineered to maximize terminal ballistics as defined by the FBI test protocol, Defender centerfire handgun ammunition provides maximum stopping power for the ultimate performance in personal defense. The innovative and proprietary Winchester bonding process welds the jacket to the lead core for improved penetration, 1.5x expansion and the proven performance needed when the stakes are high. The load also includes a notched jacket, which is preprogrammed to expand into six uniform segments for consistent tactical performance.