The Neck/Shoulder Sizing Bushings are designed specifically for Short Action Customs Modular Sizing Dies to precisely size the neck of 6MM GT cartridges and adjust bump amount.
These bushings feature a new internal geometry that reduces neck runout and enhances loaded cartridge concentricity in the chamber.
Made from 17-4 H900 stainless steel, the bushings undergo a heat treatment process ensuring a smooth inside finish and a slick external surface for improved performance.