RIO Ammunition Royal Buck 12 Gauge 2.75in 9 Pellets Centerfire Shotgun Buckshot Ammo 5 Rounds. These shells deliver impressive knockdown power making them the perfect option not only for deer hunting but also for law enforcement and home defense applications. Available in 12-gauge and 20-gauge sizes these buckshot shells are loaded with pellets of varying size according to your preference. These shells deliver an impressive muzzle velocity of up to 1345 feet per second and also come in a low-recoil version with a muzzle velocity of 1200 feet per second. Specifications for RIO Ammunition Royal Buck 12 Gauge 2.75in 9 Pellets Shotgun Buckshot Ammunition: Manufacturer: RIO Ammunition Gauge: 12 Number of Rounds: 5 Shell Length: 2 3/4 in Muzzle Velocity: 1345 ft/s Included Accessories: None Application: Large Game Shot Size: 00 Buck Shot Material: Lead Cartridge Case Material: Plastic Shotgun Pellet Count: 9 Lead Free: No Package Contents: RIO Ammunition Royal Buck 12 Gauge 2.75in 9 Pellets Centerfire Shotgun Buckshot Ammunition What is RIO Ammunition Royal Buck 12 Gauge 2.75in 9 Pellets Shotgun Buckshot Ammunition good for? The manufacturer says that it is good for large game.RIO Ammunition RB129 Royal Buck 12 Gauge 2.75 9 Pellets 00 Buck Shot 5 Bx/ 50