HEVI-Shot HEVI-Steel 12 Gauge 1-3/8oz 3.5in #4 Centerfire Shotgun Ammo 25 Rounds. Whether you're after Pheasants or Partridge these HEVI-Steel shotgun shells deliver an impressive combination of deep penetration and pattern precision that consistently takes down birds. For this round of HEVI-Steel shotgun shells HEVI-Flite propulsion systems - which are centered around a powerful combination of both concentric steel shot and nickel-plated copper - deliver an impressive muzzle velocity of 1550 feet per second. What you get is a powerful mix of HEVI-Flite performance with the densest shot felt by humans or animals on the entire planet. This is HEVI-Steel at its best. Specifications for HEVI-Shot HEVI-Steel 12 Gauge 1-3/8oz 3.5in Shotgun Ammunition: Manufacturer: HEVI-Shot Gauge: 12 Number of Rounds: 25 Shell Length: 3 1/2 in Muzzle Velocity: 1550 ft/s Application: Waterfowl Goose Shotgun Shot Weight: 1 3/8 oz Shot Material: Steel Primer Style: Centerfire Cartridge Case Material: Brass Lead Free: Yes Type: Steel Velocity: 1550 fps Fabric/Material: Steel Package Contents: HEVI-Shot HEVI-Steel 12 Gauge 1-3/8oz 3.5in Shotgun Ammunition What is HEVI-Shot HEVI-Steel 12 Gauge 1-3/8oz 3.5in Shotgun Ammunition good for? The manufacturer says that it is suitable for goose waterfowl.HEVI-Shot HS65004: HEVI-Steel 12 Gauge 1-3/8oz 3.5in #4 Centerfire Shotgun Ammo 25 Rounds