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The L.E. Wilson Neck Sizing Die Bushing .246 is the kind of small part that makes a real difference once you start chasing consistency. It's a precision-ground steel bushing that sizes the outside of your case neck to .246 inch, dropping right into a Wilson Neck Die or Wilson Bushing-Type Full-Length Sizing Die. By swapping bushings instead of leaning on a fixed neck diameter or an expander ball, you get direct control over how much grip the case neck puts on the bullet, which is one of the biggest factors in building accurate, repeatable handloads.
Consistent neck tension is what separates good brass prep from great brass prep, and this bushing is how you fine-tune it. Because the neck isn't being stretched over an expander and pulled back on every cycle, you tend to see better neck concentricity and longer brass life. For benchrest and precision reloaders, that repeatability shows up on paper. The bushing freely interchanges with Wilson bushing-type dies, so you can keep a small range of sizes on hand and adjust tension by simply changing the bushing.
Sizing selection is straightforward once you know the trick. Measure the outside diameter of a loaded round where the bullet sits in the neck, then subtract .002 to .003 inch from that number. Since brass springs back slightly after sizing, that math leaves you with roughly .001 to .002 inch of grip between neck and bullet. You can also work from neck wall thickness: multiply the wall thickness by two, add your bullet diameter, then subtract .002 to .003. Either method gets you dialed in.
Each L.E. Wilson bushing is made from hardened steel and goes through a multistep grinding process for accuracy, so it holds up through years of regular use. One thing to know going in: these fit Wilson dies and most other brands, but they do not fit Forster or Whidden dies. The die body itself is sold separately, so this is the bushing only. Stock it alongside your other sizes and you'll have the tension range you need for whatever brass and bullet combo you're running.
It tells you the bushing sizes the outside of your case neck to .246 inch, following Wilson's standard thousandths-of-an-inch naming. To find the size you need, measure a loaded round at the neck and subtract .002 to .003 inch.
It fits the L.E. Wilson Neck Die and the Wilson Bushing-Type Full-Length Sizing Die, and it interchanges freely among those dies. It also works in most other brands of bushing dies, but it does not fit Forster or Whidden. The die body is sold separately.
The simplest method is to measure the outside diameter of a loaded round where the bullet sits in the neck, then subtract .002 to .003 inch. That accounts for brass spring-back and leaves you with roughly .001 to .002 inch of neck tension on the bullet. You can also calculate it from neck wall thickness times two plus bullet diameter.
Yes, controlling neck tension with an interchangeable bushing instead of a fixed expander ball improves neck concentricity and helps your cases last longer, since the neck isn't being stretched and pulled back every cycle. Consistent neck tension is one of the key factors behind repeatable, accurate bench rest loads.
| UPC | 815145024367 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-246 |
| Shipping Weight | 0.02 |
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