Engineered to maximize terminal ballistics Winchester Defender shotshell ammunition provides maximum stopping power for the ultimate performance in personal defense. Winchester incorporates unique technologies in specific rounds including slug and buck the segmenting slug and a unique 410 round which includes Defense Discs and plated BBs. – Gauge: 20 Gauge – Length: 2 3/4 – Weight: 20 Pellets – Shot Size: 3 Buck – Muzzle Velocity: 1145 fps – Rounds Per Box: 10 – Rounds Per Case: 100