HEVI-Shot HEVI-Hammer 12 Gauge 1 1/4 oz 2 3/4in Shotgun Ammo 3 Shot 25 Rounds. The Bismuth layer is the same shot size as the steel. That small but mighty leading edge of bismuth packs nearly 50percent more knockdown power than the steel layer at 40 yards. Specifications for HEVI-Shot HEVI-Hammer 12 Gauge 1 1/4oz 2 3/4 in Shotgun Ammunition: Manufacturer: HEVI-Shot Gauge: 12 Number of Rounds: 25 Shell Length: 2 3/4 in Muzzle Velocity: 1350 ft/s Application: Upland Shotgun Shot Weight: 1 1/4 oz oz Shot Material: Bismuth Lead Free: Yes Application: Hunting Package Contents: HEVI-Shot HEVI-Hammer 12 Gauge 1.25oz 2.75in Shotgun Ammunition What is HEVI-Shot HEVI-Hammer 12 Gauge 1 1/4oz 2 3/4 in Shotgun Ammunition good for? The manufacturer thinks that it is suitable for upland.HEVI-Shot HS29103: HEVI-Hammer 12 Gauge 1.25oz 2.75in Shotgun Ammo 3 Shot 25 Rounds