Winchester Repeating Arms

Engineered to maximize terminal ballistics as defined by FBI test protocol Defender ammunition provides maximum stopping power for the ultimate in personal defense. Our innovative bonding process welds the jacket to lead core for improved penetration 1.5x expansion and the proven performance you rely on when the stakes are high. - Caliber: 10mm - Grains: 180 - Rounds per Box: 20 - Muzzle Velocity (fps): 1240 - Muzzle Energy (ft-lbs): 614