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Neck tension is one of those little details that separates good handloads from great ones, and the L.E. Wilson Neck Sizing Die Bushing in .336 gives you direct control over it. This is the interchangeable steel insert that drops into a Wilson bushing-style neck sizing die body or bushing-type full-length sizing die and sizes the outside of your case neck to a finished .336 inch. Swap it in, size your brass, and you get repeatable bullet grip batch after batch.
The real advantage of running a bushing like this is that you skip the conventional expander ball entirely. Instead of stretching the neck down and dragging it back open on every cycle, the bushing sizes the neck from the outside only. That helps keep your necks concentric and stretches the life of your brass, which anyone chasing tight groups or feeding a custom chamber will appreciate.
Wilson makes these in just about every practical size, usually in one-thousandth increments, so you can keep a small set on hand and tune tension to your exact brass and bullet combo. Picking the right one is simple: measure a loaded round at the neck where the bullet sits, then subtract about .002 to .003 inch. If your loaded neck mics around .338 to .339, the .336 bushing lands you right in that sweet spot. You can also calculate it from neck wall thickness doubled plus bullet diameter if you prefer working from components.
Each bushing is machined from polished, precision-ground steel and goes through a multistep process to hold its dimension through years of use. Because they're sold individually, a lot of reloaders build out a custom range over time so they can nudge tension up or down as their brass work-hardens or they switch bullets. It's a small part that does a big job on the loading bench, and it's made right here in the U.S.A.
It's the finished diameter the bushing sizes your case neck to, measured in thousandths of an inch. Wilson names every bushing this way, so a .336 sizes the outside of the neck to .336 inch. That naming convention makes it easy to build a set and know exactly what each one does.
Measure the diameter of a loaded round at the neck where the bullet sits, then subtract about .002 to .003 inch for proper tension. If that math lands you around .336, this is your bushing. You can also measure neck wall thickness, multiply by two, add bullet diameter, and subtract the same .002 to .003.
Yes. It's designed as a drop-in, interchangeable insert for L.E. Wilson bushing-style neck sizing die bodies and bushing-type full-length sizing dies. The die body itself is sold separately, so this is just the bushing.
A bushing sizes the neck from the outside only, so you skip the pull-through expander ball that stretches the neck on every cycle. That tends to keep necks more concentric and extends brass life. It also lets you fine-tune neck tension by simply swapping bushings.
| UPC | 815145025265 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-336 |
| Shipping Weight | 0.02 |
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