Federal 12 Gauge 1-3/8oz 3in Shotgun Ammo #3 25 Rounds RRS138. Federal collaborated with Rob Roberts and his team to develop these customized loads which pair heavy payloads and high shot counts with carefully selected velocities proven to put more pellets on target. The loads combine Federals high-performance primers and clean-burning propellant to deliver lethal shot strings through the advanced Raptor choke design. Specifications for Federal 12 Gauge 1-3/8oz 3'' Shotgun Ammunition: Manufacturer: Federal Gauge: 12 Number of Rounds: 25 Shell Length: 3 in Muzzle Velocity: 1400 ft/s Shotgun Shot Weight: 1 3/8 oz Federal RRS1383 Rob Roberts Raptor 12Gauge 3" 1 3/8oz 3Shot 25 Per Box/10 Case Federal RRS138 3: 12 Gauge 1-3/8oz 3in Shotgun Ammo #3 25 Rounds