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Precision reloaders know that neck tension is where a lot of the accuracy magic happens, and this .340 Redding bushing gives you a repeatable way to control it. It starts as heat-treated steel that's hand polished to a surface hardness of Rc 60-62, then gets a titanium nitride surface treatment layered on top to push the effective hardness even higher and slick up the sizing process. The result is a bushing that works the brass neck down with less drag, which is exactly what you want when you're chasing tight, consistent runout numbers.
This bushing measures 1/2" O.D. by 3/8" long, the standard Redding footprint, so it drops straight into any Redding bushing-style sizing die including the Type S neck and full-length dies. The .340 refers to the inside sizing diameter, and every bushing is marked with its size I.D. so you're never guessing which one is in the die. Redding offers the full lineup in .001" steps from .185" through .368", so you can fine-tune neck tension to your exact brass.
Sizing your neck correctly is all about measurement. Measure the outside neck diameter of a loaded or dummy cartridge with a quality micrometer, then subtract about .001" to .002" to allow for brass spring-back. That gives you a proper press fit on the bullet without overworking the neck. If you run several different lots or headstamps of brass, it's common to keep a couple of adjacent sizes on hand since neck wall thickness varies between manufacturers.
Both Redding bushing styles share the same dimensions and interchange freely, so the choice comes down to feel and longevity. The TiN version runs slicker and takes less effort to size, and that coating resists scratching and wear over a long service life. Plenty of handloaders who've run these for years stick with the titanium nitride for the smoother operation, especially when minimizing stress on the brass matters. Keep in mind the bushing sizes only the neck, so your shellholder and die are sold separately. Made in the USA.
It fits all Redding bushing-style sizing dies, including the Type S neck sizing and full-length dies. The bushing uses the standard 1/2" O.D. by 3/8" long footprint, so it interchanges freely across Redding's bushing die lineup. Your die and shellholder are sold separately.
Measure the outside neck diameter of a loaded or dummy cartridge with a precision micrometer, then subtract about .001" to .002" to account for brass spring-back. The result is your ideal bushing size. Since neck wall thickness varies by brass maker and lot, it's smart to keep an adjacent size or two on hand if you run mixed headstamps.
Both start as the same Rc 60-62 heat-treated, hand-polished steel and share identical dimensions. The titanium nitride version adds a surface treatment that increases the effective hardness and reduces friction, so it sizes necks with noticeably less effort and resists wear and scratching over time. Many handloaders prefer the TiN for smoother operation and less stress on the brass.
Yes, lubing the inside of the case neck is still recommended even with a titanium nitride bushing. The coating reduces sizing friction, but a little neck lube keeps the operation smooth and helps protect concentricity. Many reloaders use dry graphite or a light case lube for this step.
| UPC | 611760763403 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 76340 |
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