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This is the .225 diameter titanium nitride neck sizing bushing from Redding, part number 76225. If you run a bushing-style neck or full-length sizing die, this is the little piece that actually controls how much your case necks get squeezed down. Instead of relying on a fixed-size die and an expander ball to set neck tension, you pick a bushing that sizes the neck to a specific diameter, which lets you hold the bullet with just the right amount of grip and avoid overworking the brass.
Under the gold-colored coating this is heat-treated steel, hand polished to a hardness of around Rc 60-62. The titanium nitride surface treatment bumps up the hardness even further and cuts down sizing friction, so necks slide through smoother and the bushing resists wear and marking over long reloading sessions. Plenty of handloaders find the TiN versions pull through the brass noticeably easier than plain steel, especially on necks that have been annealed.
Every one of these bushings shares the same outside dimensions, 1/2 inch O.D. by 3/8 inch long, so they drop right into all Redding bushing-style sizing dies and also interchange with Wilson-style bushings. That means you can build a small collection of sizes and swap them around as your brass, bullets, and neck thickness change from lot to lot. To find your size, measure the outside neck diameter of a loaded round with a good micrometer and subtract the amount of tension you want, usually a couple thousandths.
A quick tip from experience: lube your case necks and install the bushing with the numbers facing down toward the shoulder. That keeps the sizing smooth and helps the bushing leave your necks clean and unmarked. A touch of Imperial sizing wax or your preferred lube goes a long way toward long brass life and consistent results on target.
It fits all Redding bushing-style neck sizing and full-length sizing dies. Because it uses the standard 1/2 inch O.D. by 3/8 inch long format, it also interchanges with Wilson-style bushings. The bushing itself is sold separately from the die, so you will need a compatible bushing die to use it.
Measure the outside diameter of a loaded cartridge neck with a precision micrometer, then subtract the amount of neck tension you want, typically about .001 to .002 inch. The result is your ideal bushing size. Keep in mind neck wall thickness varies by brass brand and lot, so some reloaders keep a size or two on either side to fine-tune tension.
Both start as heat-treated steel polished to roughly Rc 60-62, but the TiN coating adds surface hardness and reduces sizing friction. In practice that means a smoother, easier sizing stroke and a bushing that is more resistant to marking the necks. Lubing your case necks is still recommended with either type.
Yes, lubing the necks is recommended even with the slick TiN finish. A light application of a quality case lube like Imperial sizing wax keeps the sizing smooth, protects the brass, and helps the bushing leave clean, unmarked necks. Redding also suggests installing the bushing with the printed numbers facing down for best results.
| UPC | 611760762253 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 76225 |
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