RCBS 0.249" Neck Bushing

These precision machined, self-aligning neck bushings are designed for use with RCBS gold medal match series reloading dies, allowing users to finely control neck tension on bullets, which decreases brass work hardening and results in longer case life and superior shot accuracy. To take full advantage of these benefits, only brass with consistent neck wall thickness should be used. Reloaders can determine the ideal bushing by measuring the outside neck diameter of a loaded round and subtracting 0.002 - 0.003 inches or by calculating twice the neck wall thickness, adding the bullet diameter, then subtracting 0.001 inches. RCBS recommends maintaining a set of bushings that span one to two sizes above and below the calculated ideal for flexibility. Proudly made in the USA for superior quality and reliability