Maximize your precision and prolong your brass life with RCBSs self-centering neck bushings, which work seamlessly with gold medal match series dies to allow for ultra-fine neck tension adjustments. By minimizing neck brass fatigue, they enhance accuracy over repeated reloads-but they require consistent brass neck thickness to function effectively. Choose the right size by subtracting 0.002 - 0.003 inches from the loaded cartridge's neck diameter or using the calculation - (2 x neck wall) + bullet diameter - 0.001 inches. RCBS recommends carrying bushings slightly above and below your target dimension.

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