The Neck/Shoulder Sizing Bushings are designed to work with Short Action Customs' Modular Sizing Dies, allowing precise adjustment of bump and full neck sizing for cartridges.
These bushings feature a new internal geometry aimed at reducing neck runout and improving loaded cartridge concentricity in the chamber.
Made from 17-4 H900 stainless steel with heat treatment for durability, they offer a smooth inside and slick external finish for enhanced performance.