These RCBS self-centering neck bushings, made for gold medal match series dies, deliver unparalleled precision when adjusting bullet neck tension. They help prevent premature brass hardening, resulting in better case longevity and tighter groupings. Uniform brass is a must for full effectiveness. Determine the correct bushing size by subtracting 0.002 - 0.003 inches from the neck diameter of a loaded round or use the wall thickness formula. RCBS advises owning bushings a size or two above and below your target diameter to fine-tune for any brass variations.

• Proudly made in the USA for superior quality and reliability