Hevi-shot's hevi-steel delivers major kinetic energy.It features an increase in speed that delivers 9% more energy at 30 yards and 8% at 40.In short you will get more knockdown power and fewer crippled birds.Combining higher velocity a best-in-class wad and precision manufacturing techniques deliver the ultimate in performance.Application: HuntingGauge: 12 GaugeLength: 3.50Ounces: 1 3/8 ozShot Size: 1Muzzle Velocity: 1550 fpsRounds Per Box: 25Boxes Per Case: 10Hazair: Yes"