RCBS Tungsten Coated Neck Sizing Bushing is designed for use with RCBS Gold Medal Match neck sizing dies, providing precise bullet tension without needing traditional case lube.
The bushings feature a Tungsten Disulfide coating for reduced friction and should be self-centered for proper case neck alignment.
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, then subtract the same amount.