Redding 220 Swift C-I Type S Bushing Dies FL Sizer

Redding 220 Swift C-I Type S Bushing Dies FL Sizer Dies 
Interchangeable Bushings Compensate for Differences in Cartridge Brass Thickness.
  The amount of resizing provided by conventional reloading dies has  always been dictated by the manufacturing tolerances (SAAMI specifications) of the brass cartridge case itself. Reloading die  manufacturers have been forced to design the neck diameter of their dies small enough to accommodate the thinnest possible brass. This may be as much as .008" - .010" smaller than the maximum cartridge dimensions typically shown in most reloading manuals. Since the majority of cases that the reloader is likely to encounter in the field are thicker than the minimum specifications that the dies were designed for, case necks are often  resized excessively. It can be easily demonstrated that excessive resizing of the cartridge case quickly leads to stress distortion and concentricity problems. Type S - Bushing Style Dies offer a simple solution to this age old problem.
   Full Length Resizing while maintaining exact control of the case neck is often desirable in one operation. The Type S - Full Length Resizing/Bushing Die accomplishes this task with the precision you would expect from Redding.