Neck sizing dies size only the case neck of the cartridge - not the shoulder or the case body. Use neck dies when cases are fired in the same rifle and a close cartridge case to chamber fit is desired. The neck die will size the neck, decap the spent primer, then size for correct bullet tension with the expander ball.

303-25 Neck Die by Simplex for sale since 2010-10-26 23:01:30