Engineered to give reloaders total control over bullet seating tension, these self-centering, changeable RCBS neck bushings are made for use with gold medal match series dies and they're ideal for reducing neck work hardening, extending case life and tightening shot groups-assuming consistent brass neck wall thickness. Select your bushing by subtracting 0.002 - 0.003 inches from a loaded round's outside neck diameter or by doubling the case neck wall, adding bullet diameter and subtracting 0.001 inches. RCBS advises keeping nearby sizes on hand for dialing in the perfect fit.

• Proudly made in the USA for superior quality and reliability