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The Neck/Shoulder Sizing Bushings from Short Action Customs are made for use in their Modular Sizing Dies. These are cartridge specific sizing bushings that allow you to dial in the correct amount of bump while also fully sizing the neck of the cartridge. These new bushings address the inherent flaws with the old sizing system with all new internal bushing geometry designed to reduce neck runout while increasing loaded cartridge concentricity in the chamber.


Made from 17-4 H900 stainless steel, then processed with the same heat treat as the Precision Resizing Dies. These neck/shoulder bushings have an incredibly smooth inside finish paired with an extremely slick external finish from heat treat.