The bismuth high performance non-toxic rounds have 24% greater density than steel and each configuration is loaded to optimal velocities, maximizing ballistic performance.It's softer than steel and higher performance, so it won't harm barrels and is safe in any choke.It has a high-density, low flash, double-base powder for clean-burning, all weather performance, and is contained in a high tensile strength tube.Gauge: 20 GaugeType: BismuthLength: 3"Ounces: 1 ozShot Size: 4Muzzle Velocity: 1400 fpsRounds Per Box: 25Boxes Per Case: 10Shot Type: BuckshotApplication: HuntingHazair: Yes