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This is Redding's .285 diameter neck sizing bushing with the titanium nitride treatment, part number 76285. If you're running a bushing-style neck die and want to control how much your brass necks get worked, this is the piece that does it. The bushing is heat treated steel with a titanium nitride surface coating that bumps up the surface hardness and cuts down on sizing friction, so your sizing stroke feels smoother and the bushing holds up over a lot of brass.
A standard full-length die sizes every neck down to one fixed dimension, which usually means working the brass more than it needs. With a bushing die, you pick the exact amount of neck sizing by choosing the bushing diameter. The idea is to size the neck just enough to hold the bullet securely without over-stretching the brass, which keeps your necks living longer and your runout tighter. Redding offers these in .001 inch increments across a huge range, so you can fine tune neck tension to the thousandth.
The common method is to measure the outside neck diameter of a loaded round with a good micrometer, then subtract .001 to .002 inch to account for brass spring-back and the tension you want on the bullet. A lot of handloaders buy the size they calculate plus one above and one below so they have room to experiment. Keep in mind this works best with brass that has uniform neck wall thickness or has been neck turned, since inconsistent necks can translate into inconsistent tension.
These bushings measure 1/2 inch outside diameter by 3/8 inch long and freely interchange in all Redding bushing-style neck sizing dies, including the Type S and Competition neck dies. They also fit a variety of other bushing-style dies that accept the L.E. Wilson style, so they'll work in setups from several brands. Each bushing is clearly marked with its size ID so you always know which one is loaded in your die. Made in the USA.
Measure the outside neck diameter of a loaded cartridge with a micrometer, then subtract about .001 to .002 inch to allow for brass spring-back and the neck tension you want. If that math lands on .285, this is your bushing. Many handloaders also keep the next size up and down on hand to fine tune tension during load development.
It fits all Redding bushing-style neck sizing dies, including the Type S and Competition neck dies, and interchanges freely because of its standard 1/2 inch O.D. by 3/8 inch length. It also works in many other bushing-style dies that accept the L.E. Wilson style bushing. The bushing is sold separately from the die.
Both styles share the same dimensions and interchange in the same dies, but the titanium nitride treatment adds surface hardness and reduces sizing friction. That means a smoother sizing stroke and a bushing that holds up well over a lot of brass. Performance-wise they size the same diameter, so it comes down to the slicker feel and added durability.
Most handloaders control neck tension with the bushing alone and remove the expander, since the bushing sets the neck diameter directly. This works best with brass that has consistent neck wall thickness or has been neck turned. If your neck thickness varies noticeably, running a mandrel or using the expander can help even out tension.
| UPC | 611760762857 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 76285 |
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