RB209 Royal Buck 20ga 2-3/4″ 9 pellets. Royal Buck buckshot cartridges are a key line for the hunter, competition shooter or those concerned with personal defense. A variety of shot sizes and payloads weights allow each shooter to match the perfect cartridge to their intended need. Adding in low-recoil options even further enhances the sense of choice. In all of our buckshot loads, our proprietary wad that ensures a cohesive payload flight path and pattern dispersion.