RCBS 0.333" Neck Bushing

Precision reloaders using RCBS gold medal match series dies can now fine-tune bullet tension thanks to these self-centering, interchangeable neck bushings. This level of customization decreases brass fatigue and boosts accuracy. For optimal results, high-quality brass with consistent neck wall thickness is essential. Ideal bushing size can be calculated by subtracting 0.002 - 0.003 inches from a loaded round's neck diameter or by doubling the neck wall thickness, adding the bullet diameter and s