RCBS Supreme Die Set .223 Rem 4-Piece Full-Length

The RCBS Supreme Die Set for .223 Remington bundles everything needed to start reloading bottleneck rifle cases into a single, convenient four-piece package. It pairs the proven RCBS two-die Full-Length set with a Chamber Case Length Gauge and a matched Shell Holder, so the reloader is equipped for sizing, decapping, case-length checking, and bullet seating right out of the box.

The core of the set is a Full-Length Sizer Die with an integrated Expander-Decapping Unit, designed to resize fired .223 Rem brass back to SAAMI specification and restore the case mouth in one step. The matched Seater Die seats bullets to a consistent overall length, giving reloaders the uniform seating depth needed for accurate groups and reliable feeding. Both dies cut on standard 7/8"-14 threads, so they mount in any single-stage or progressive press that accepts RCBS dies.

The included Chamber Case Length Gauge is a simple, go/no-go tool for confirming that trimmed cases will chamber safely in the rifle - a critical step for bottleneck cartridges like the .223 Rem where case-length control directly affects pressure and function. The supplied Shell Holder is sized to the .223 Rem case head and drops into any RCBS press shell-holder slot.

This set is intended for bottleneck rifle cases and is well suited to varmint hunting, target shooting, plinking, and general range use. Together, the four components give the reloader the dependable case preparation and consistent seating RCBS is known for, with the convenience of having the gauge and shell holder included from the start.