RCBS Small Base Die Set, For .223 Remington 11103 Made of the highest quality materials Hunting reloading dies Another quality Bushnell product Usually required for reloading ammunition to be used in automatic, semi-automatic, pump, slide and some lever-action rifles These dies size the body of cases somewhat smaller in diameter and also set the shoulder back slightly more than a Full-Length Sizer Die Not recommended for ammunition used in bolt-action rifles Small Base Set contains Small Base Sizer with Expander-Decapping Unit and Regular Seater Die with Seater Plug