The gold medal match series neck bushings from RCBS are self-centering and easy to swap, giving reloaders total control over bullet seating tension. When paired with brass of consistent neck thickness, these bushings reduce neck fatigue and increase both case life and shot precision. To determine the proper size, subtract 0.002 - 0.003 inches from the loaded round's neck diameter or use the calculation: (neck wall thickness x 2) + bullet diameter - 0.001 inches. For best results, RCBS advises having bushings a size or two above and below your ideal diameter.

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