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Neck tension is one of those details that separates good handloads from great ones, and this .307 bushing gives you direct control over it. Redding builds these from heat-treated hardened steel and adds a Titanium Nitride coating on top, which bumps up the surface hardness and smooths the whole sizing process. That slicker surface means less drag on the brass neck as it passes through, so you're not overworking the metal every time you resize.
Instead of squeezing the neck down more than it needs and then pulling it back open with an expander, a bushing sizes the neck to one specific diameter. You pick the number, you get the tension. To figure out which bushing you need, measure the outside neck diameter of a loaded round with a good micrometer, then subtract about .001 to .002 inches to account for brass spring-back and bullet grip. For a lot of loads that math lands right on .307.
This bushing carries the standard Redding external dimensions, a 1/2 inch outside diameter and 3/8 inch length, so it drops straight into any Redding bushing-style neck sizing die. It also plays nice with most other popular brands of bushing dies on the market. The size is marked right on the bushing itself, so once you build up a collection you can tell them apart at a glance. Redding offers the TiN line in .001 inch steps across a wide range, which makes it easy to fine-tune your tension as your brass and chambers change over time.
If you're chasing tighter groups and more uniform velocity, matching your neck tension to your exact brass is one of the simplest upgrades you can make, and a bushing like this is where that process starts.
Measure the outside neck diameter of a loaded cartridge using a precision micrometer, then subtract about .001 to .002 inches to allow for brass spring-back and bullet tension. Whatever number that gives you is the bushing size to start with. If the result lands at .307, this is the one you want.
It fits all Redding bushing-style neck sizing dies right out of the box thanks to the standard 1/2 inch outside diameter and 3/8 inch length. It's also compatible with most other popular brands of bushing dies, so you're not locked into one setup.
The TiN coating goes on top of the same heat-treated steel and increases the surface hardness while reducing friction during sizing. That added lubricity means the brass neck slides through with less drag, which helps keep your neck tension consistent and your brass lasting longer.
A bushing lets you size the neck to one exact diameter rather than over-squeezing and then pulling it back open with an expander. Controlling neck tension this precisely gives you more uniform bullet grip, which often translates to tighter groups and steadier velocity. It's a popular step among precision handloaders.
| UPC | 611760763076 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 76307 |
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