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This is the .258 diameter Titanium Nitride neck sizing bushing from Redding, part number 76258. It starts life as heat-treated steel, then gets a Titanium Nitride surface treatment that bumps the effective surface hardness up around Rc 85 and smooths out the sizing stroke. For handloaders who care about consistent neck tension and keeping their brass alive through more reloading cycles, that slick coating makes a real difference at the press.
Redding neck bushings come in two flavors, steel and this Titanium Nitride version, and both share the same 1/2 inch outside diameter by 3/8 inch length. That means this .258 bushing drops right into any Redding bushing-style neck sizing die and freely interchanges with Wilson-style bushings too. It's marked with its size on the face, so when you've got a few in your kit you can grab the right one without second-guessing.
The whole point of a bushing system is control. Instead of over-working your case necks with a one-size-fits-all expander, you pick the exact bushing that matches your brass and your preferred bullet grip. To find the right size, measure the outside neck diameter of a loaded cartridge with a good micrometer, then subtract about .002 inches to allow for brass spring-back. That gives you a proper press fit on the bullet without stretching the brass more than it needs. If your necks vary in wall thickness, a lot of reloaders will size down a touch and finish with an expander for the final inside diameter.
The reduced friction from the TiN treatment means less effort on the handle and less stress on your case necks during sizing. That translates to brass that stays straighter and lasts longer, which matters when you're chasing tight groups or just trying to get the most out of a batch of quality cases. It's a small part that punches well above its weight in a precision reloading setup.
Measure the outside neck diameter of a loaded cartridge with a precision micrometer, then subtract about .002 inches to account for brass spring-back. If that lands you at .258, this is your bushing. You can also double your neck wall thickness, add the bullet diameter, and subtract .001 to .002 inches to get there.
Yes, as long as you're running a Redding bushing-style neck sizing die. It uses the standard 1/2 inch O.D. by 3/8 inch length and drops right in. It also interchanges freely with Wilson-style bushings if you use those.
The TiN surface treatment increases the effective hardness and cuts down on sizing friction compared to standard steel. That means a smoother sizing stroke and less stress on your case necks, which helps the brass last longer. If you reload the same cases many times, that reduced wear adds up.
No, this is just the bushing itself. The decapping rod and expander live in your sizing die, not in the bushing. You're buying the interchangeable sizing bushing to set your neck tension.
| UPC | 611760762581 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 76258 |
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