RCBS Tungsten Coated Neck Sizing Bushings provide precise bullet tension without needing traditional case lube, thanks to their Tungsten Disulfide coating.
These bushings are self-centering, ensuring proper alignment with the case neck, and are specifically designed for use with RCBS Gold Medal Match neck sizing dies.
To select the correct bushing size, subtract .002" to .003" from the loaded cartridge's outside neck diameter, or calculate using case neck wall thickness plus bullet diameter minus .002" to .003".