RCBS Matchmaster Comp Seat Die for .223 Remington * Precision Bullet Seating ToolRCBS Matchmaster Comp Seat Die 223 Rem The RCBS Matchmaster Comp Seat Die for . 223 Remington is engineered for reloaders seeking exceptional accuracy and consistency. Designed specifically for the . 223 Rem cartridge, this die features a bullet seating window with a retaining system that simplifies the seating process, ensuring precise placement of each bullet. The micrometer adjustable, free floating seating stem allows for fine tuning, enabling