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This is the .289 diameter steel neck sizing bushing from L.E. Wilson, a small part that carries a lot of weight in a precision reloading setup. It drops into your Wilson neck die or bushing-type full-length sizing die and sizes the case neck down to grip the bullet with the amount of tension you want. For handloaders chasing tight, repeatable groups, controlling neck tension is one of the biggest levers you can pull, and a dedicated bushing lets you do it without working the brass any more than necessary.
Getting the size right comes down to measurement. The simplest route is to measure the outside neck diameter of a loaded round where the bullet sits, then subtract .002 to .003 inches. That accounts for a little brass spring-back and leaves you with the roughly .001 to .002 inches of grip you're after. You can also measure your neck wall thickness, multiply by two, add the bullet diameter, then subtract the same .002 to .003. Both methods land you in the same ballpark, so use whichever tools you have on the bench.
One thing that sets these apart is the reamed taper built into the bushing. The marked size refers to the middle of the bushing, and since the case neck only reaches that midpoint, you can flip the bushing over with the numbers facing down to squeeze a touch more tension out of the same size. That's a genuinely useful move when your brass has work-hardened and started springing back, or when you want to fine-tune grip without jumping to the next smaller bushing.
Machined from steel and made in the USA, these bushings interchange freely across Wilson bushing-style dies and play nicely with Redding, RCBS, Hornady, and other common bushing dies. They don't fit Forster or Whidden setups. Many reloaders keep several sizes on hand to tune tension for different bullets, brass lots, and conditions, and this .289 fits right into that kind of modular workflow.
Measure the outside neck diameter of a loaded round where the bullet sits, then subtract .002 to .003 inches. If that math lands you near .289, this is your bushing. You can also calculate it by doubling your neck wall thickness, adding the bullet diameter, and subtracting .002 to .003.
Yes. These bushings interchange freely across Wilson bushing-style dies and fit most other common bushing dies including Redding, RCBS, and Hornady. They do not fit Forster or Whidden dies, which use their own bushing design.
The marked size refers to the middle of the bushing, which is reamed with a .003 inch taper. Since the case neck only reaches that midpoint, you can flip the bushing over with the numbers facing down to get slightly more neck tension from the same size. It's a handy way to tighten grip on work-hardened brass without jumping to a smaller bushing.
In most bushing setups, yes. The bushing sets your neck diameter directly, which typically removes the need for an expander ball. That means less working of the brass and more consistent neck tension from case to case.
| UPC | 815145024794 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-289 |
| Shipping Weight | 0.02 |
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