Self-centering and easily swapped out, these neck bushings for RCBS gold medal match series dies help fine-tune neck tension during reloading, reducing the brass's stress and extending case life while boosting accuracy. This level of precision requires brass with consistent neck wall thickness. Reloaders can determine the ideal bushing size by measuring the loaded round's outside neck diameter and subtracting 0.002 - 0.003 inches or by calculating two times the wall thickness plus the bullet diameter, minus 0.001 inches. It's advised to have bushings both above and below your desired size for adaptability.

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