The NECK/SHOULDER SIZING BUSHINGS are designed to fit Short Action Customs Modular Sizing Dies, specifically for the 6mm Dasher cartridge, with a .265" diameter.
These bushings aim to improve loaded cartridge concentricity and reduce neck runout with a new internal geometry.
Constructed from 17-4 H900 stainless steel, they undergo the same heat treatment as Precision Resizing Dies for a smooth and slick finish.