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This is the .312 inch Titanium Nitride neck sizing bushing from Redding, the little part that lets you control exactly how much your case neck gets squeezed. Instead of oversizing the neck and dragging it back open with an expander, a bushing sizes the outside of the neck down to a precise diameter, so you set your own neck tension and hold the bullet without working the brass any more than you have to. Pick your diameter, drop it in, and you're set.
The body is heat-treated steel, and the sizing diameter is hand-polished to a surface hardness of Rc 60-62 to keep sizing effort low. On top of that, this version carries a titanium nitride coating, the familiar gold tone finish, which bumps up the effective surface hardness even further and slicks things up to reduce friction as the neck passes through. Every bushing is clearly marked with its I.D. so there's no guessing which one you grabbed off the bench.
All Redding neck sizing bushings share the same outside dimensions, 1/2 inch O.D. by 3/8 inch long, so they freely interchange across Redding bushing-style neck sizing dies, including the Type S and Competition die families. They're offered in .001 inch increments across the full .185 to .368 range, covering calibers from .17 all the way up to .338. This .312 sits right in the .32 caliber window and is a common pick for .308 and .30 caliber loads once you figure in neck wall thickness and the tension you're after.
Figuring out the right size is simple. Measure the outside neck diameter of a loaded or dummy round with a good micrometer, then subtract about .001 inch for your bushing. If you don't neck turn and your neck walls vary, many reloaders go a touch smaller and let an expander finish the inside diameter, while turned-neck brass runs beautifully with the bushing alone.
It fits all Redding bushing-style neck sizing dies, including the Type S and Competition series, since every Redding bushing shares the same 1/2 inch O.D. by 3/8 inch long dimensions. Just drop it into the die and it self-centers. Dies and shellholders are sold separately.
Measure the outside neck diameter of a loaded or dummy round with a good micrometer, then subtract about .001 inch to get your bushing size. You can also measure neck wall thickness, double it, and add the bullet diameter before subtracting that .001 inch. If your neck walls vary a lot, it often helps to go a thousandth smaller and let an expander set the final inside diameter.
The TiN coating goes over the same heat-treated steel body and raises the effective surface hardness while reducing friction during sizing. In practice that means smoother, easier sizing and a bushing that holds up well over a long reloading career. It's the gold-colored finish you'll see compared to the plain steel version.
That depends on your brass. If you neck-turn your cases for uniform wall thickness, you can run the bushing alone for very consistent neck tension. With unturned brass that varies in thickness, many reloaders keep an expander in the die so the inside neck diameter stays uniform.
| UPC | 611760763120 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 76312 |
| Shipping Weight | 0.0188 |
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