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If you run a Redding bushing-style neck sizing die and want to dial in exactly how much grip your case necks have on the bullet, this .290 steel bushing is the piece that makes it happen. Rather than relying on a fixed expander to set your neck diameter, you pick the bushing that matches your brass and bullet combo, which means you control neck tension instead of letting the die decide for you. That kind of control is what separates plinking ammo from rounds that print tight groups.
This bushing is machined from heat-treated steel with a surface hardness of Rc 60-62, and the sizing diameter is hand-polished to cut down on sizing effort and keep brass flowing through smoothly. The steel construction holds its dimension over a long service life, so the .290 you buy today sizes the same way years down the road. Redding offers these in .001 inch increments across a huge range, so once you nail down your number you can fine-tune up or down a thousandth to adjust tension.
These share the standard Redding bushing footprint and drop straight into any Redding bushing-style neck sizing die. They also interchange with L.E. Wilson style bushings, so if you're running mixed gear on your press you're covered. Each one is stamped with its size so you'll never second-guess which bushing is sitting in your die.
Picking the right size is simple. Measure the outside neck diameter of a loaded round with a micrometer, then subtract about .001 to .002 inches to allow for brass spring-back. A .290 bushing is a common landing spot for loaded necks measuring right around .291 to .292, which covers a lot of popular 6.5mm builds. Measuring several loaded rounds and working off the average gives you the most reliable starting point.
Measure the outside neck diameter of a loaded round with a micrometer, then subtract about .001 to .002 inches to account for brass spring-back. If your loaded necks measure right around .291 to .292, the .290 is a solid starting point. Measuring several rounds and averaging gives you the most dependable number, since neck wall thickness can vary.
Yes, it drops into any Redding bushing-style neck sizing die using the standard footprint. It also interchanges with L.E. Wilson style bushings, so it works across most popular bushing setups. The bushing is stamped with its size, so you can always confirm which one is loaded.
A bushing die lets you set the neck diameter to exactly where you want it, which means you control neck tension rather than letting a fixed expander decide. That typically works the brass less and helps keep neck tension consistent from case to case. The heat-treated steel at Rc 60-62 hardness also holds its dimension for the long haul.
That depends on your brass and how you load. Many precision reloaders pull the expander and let the bushing set the final neck dimension, which cuts down on runout. If your neck wall thickness varies more than a couple thousandths, running the expander can help even out the inside diameter, so it comes down to how uniform your brass is.
| UPC | 611760732904 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 73290 |
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