Redding Neck Sizer Bushings freely interchange in all Redding Bushing-Style Sizing Dies. They are available in .001″ increments covering all calibers from 17 to 338. By selecting the correct bushing, you are now able to provide just the right amount of neck tension to properly hold the bullet without excessive resizing. All bushings are marked with size identification. To determine proper Bushing size, measure the outside neck diameter of a loaded cartridge with a precision micrometer, then subtract .001″ to .002″, to allow for brass spring back and bullet tension. Shellholder and dies sold separately. Made in the USA.

Redding bushings are hand polished with a surface hardness of Rc 60-62 to reduce sizing effort.

Titanium Nitride bushing offer the same features as steel bushings, but also feature titanium nitride to further increase the surface hardness and reduce sizing friction.

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How to Determine Which Bushings You Need:
The easiest way to determine the proper diameter bushing, is to measure the neck diameter of several loaded or dummy cartridges with an accurate micrometer. Subtract .001?- .002? from the average neck diameter and this diameter bushing will generally size case necks to create the proper press fit for the bullet.
Another method is to measure the neck thickness with a ball micrometer or Redding?s Case Neck Gauge. Double the wall thickness and add this number to the bullet diameter. The result is the neck diameter of a loaded cartridge, and bushing size can be determined as above.
Shell Holder Sold Separately
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