RCBS - Gold Medal Match Series Bushing Neck Sizer Die 300 Winchester Magnum - 15335
These Neck Sizer Dies use precision-machined neck bushings (sold separately) to size the case neck just enough provide the exact amount of bullet tension without overworking the brass.
Gold Medal Match sizing dies use a separate neck bushing. Neck bushing is not included.
To determine bushing size, measure the outside neck diameter of a loaded cartridge, subtract .002" to .003" -- this allows approximately .001" of brass spring back for correct neck tension.
Another method is to measure the neck wall thickness of a case, multiply by two, add the diameter of the bullet and subtract .001" -- RCBS suggests purchasing neck bushings one to two sizes above and below the target diameter. Neck Sizer Dies size only the neck of the case (NOT the shoulder or body) just enough to snugly hold the bullet for extended case life and accuracy Shellholder not included.
Gold Medal Match bushing dies will accept bushings made by Hornady, Redding or Wilson in addition to RCBS bushings.
Made In United States of America