Neck bushings are not included. Proper neck bushing size can be
determined two ways. Measure the outside neck diameter of your loaded
cartridge, subtract .002” to .003”. This allows approximately .001” of
brass spring back for correct neck tension. The other is to measure the
neck wall thickness of your case, multiply by two, add the diameter of
your bullet and subtract .001”. RCBS suggests that you have neck
bushings one to two sizes above and below your target diameter. The
Gold Medal seat dies features a micrometer adjustable, free floating
and self centering bullet seating system with a convenient bullet
loading window. Includes: Bushing Neck Sizer Die and seating die.
Shellholder not included.
RCBS Gold Medal Match bushing dies will accept bushings made by Hornady, Redding
or Wilson in addition to RCBS bushings.