RCBS Gold Medal Match Series Bushing 2-Die Neck Sizer Set 308 Winchester

The RCBS Bushing Neck Sizer Die Set for .308 Winchester features a Neck Sizer die that uses precision-machined neck bushings (sold separately) to size the case neck just enough provide the exact amount of bullet tension without overworking the brass. The Neck Sizer die sizes only the neck of the case (NOT the shoulder or body) just enough to snugly hold the bullet for extended case life and accuracy. To determine the proper neck bushing size, measure the outside neck diameter of a loaded cartridge and subtract 0.002" to 0.003" to allow for a small amount of brass spring back. Shellholder sold separately.