RCBS 0.335" Neck Bushing

Engineered for serious reloaders, these RCBS gold medal match series-compatible neck bushings self-center and are easy to swap, giving you pinpoint control over neck tension. Reducing case neck work hardening, they extend the life of your brass while enhancing shot precision. Use only uniform brass for best performance. To find the right size, either subtract 0.002 - 0.003 inches from the loaded round's neck diameter or apply the formula: double the neck wall thickness, add bullet diameter, subt