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The L.E. Wilson .249 Steel Neck Sizer Die Bushing is one of those small parts that makes a real difference once you start chasing consistency. It sizes the outside of your case neck to the diameter you choose, giving the bullet the right amount of grip without overworking the brass. L.E. Wilson has been building precision reloading tools in the USA for decades, and these bushings are precision ground steel for a clean, repeatable size every time.
This bushing drops into a Wilson Neck Sizer Die or a Wilson bushing-type full length sizing die. Because it sizes the neck from the outside without a conventional expander ball being dragged back through, you get more uniform neck tension, better concentricity, and longer brass life. One nice detail on Wilson bushings: the marked size refers to the middle of the bushing, which is reamed with a slight taper. If you want a touch more grip, you can flip the bushing over with the markings facing down for a slightly tighter size.
The quick method is to measure the outside neck diameter of a loaded round with a good micrometer, then subtract .002 to .003 inches. That accounts for brass spring-back and leaves you with roughly .001 to .002 of real grip on the bullet. You can also measure your neck wall thickness, multiply by two, add your bullet diameter, then subtract .002 to .003. Wilson makes these in .001 inch increments, so a lot of reloaders keep a few sizes on hand to tune tension for different brass lots, bullets, or seasons.
For precision shooters and load developers, consistent neck tension is a big lever for shrinking groups and tightening velocity spread. This .249 bushing gives you a simple, durable way to control that variable and get repeatable results batch after batch.
It is designed for L.E. Wilson neck sizing dies and Wilson bushing-type full length sizing dies. The bushings freely interchange between those dies, so you can swap sizes as your loads change. Keep in mind the die itself is sold separately from the bushing.
Measure the outside diameter of a loaded round at the neck with a precision micrometer, then subtract .002 to .003 inches. That gives you a starting bushing size that accounts for brass spring-back. You can also measure neck wall thickness, double it, add your bullet diameter, then subtract .002 to .003.
Yes. The marked .249 size refers to the middle of the bushing, which is reamed with a slight taper. Flipping the bushing over so the markings face down toward the case gives you a slightly tighter size, which is handy when brass has work-hardened and springs back more.
A bushing sizes the outside of the neck without dragging an expander ball back through, which tends to produce more consistent neck tension and better concentricity. It also works the brass less, which helps extend case life. That consistency is why precision and benchrest reloaders lean on this setup.
| UPC | 815145024398 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-249 |
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