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Neck tension is one of those details that separates loads that just go bang from loads that print tight groups, and that's exactly where this L.E. Wilson .335 bushing earns its keep. It installs inside a Wilson Neck Die or a Wilson Bushing-Type Full-Length Sizing Die and sizes the outside of your case neck to a set diameter, giving you the right amount of grip on the bullet without relying on a traditional expander ball. The bushing is machined from hardened, precision-ground tool steel, and like every Wilson bushing it goes through a multi-step process to hold its dimension through years of use.
The number stamped on the bushing is the diameter it sizes your case neck to, following Wilson's standard thousandths-of-an-inch naming. To figure out which size you need, measure a loaded round right where the bullet sits in the neck, then subtract .002 to .003 for proper tension. You can also work it from the brass itself: take your neck wall thickness, multiply by two, add your bullet diameter, then subtract .002 to .003. Having the whole range available is what lets you fine-tune grip as your brass and bullet combination changes.
Sizing the neck with an interchangeable bushing instead of pulling it over a fixed expander ball keeps the neck concentric and cuts down on how hard you work the brass each cycle. Less stretching and pulling means longer case life and more consistent seating from round to round, which is why this setup is a favorite among benchrest and precision handloaders. One note worth keeping in mind: these bushings are taper reamed, so the number side goes up, with that top side running slightly smaller than the base.
The bushing works with any Wilson bushing-type neck or full-length die, so once you've got the die body, swapping sizes is quick and tool-free. It's a simple, well-made piece that does a lot of the heavy lifting in a precision load workup.
The number is the diameter the bushing sizes your case neck to, following Wilson's standard thousandths-of-an-inch naming convention. In this case, it sizes the outside of the neck to .335 inch. To pick the right size, measure a loaded round where the bullet sits in the neck and subtract .002 to .003 for proper tension.
It fits the L.E. Wilson Neck Die and the Wilson Bushing-Type Full-Length Sizing Die. The die body is sold separately, so you'll want to have that on hand. Once you do, the bushing drops right in and swaps out tool-free when you want to change tension.
Yes. These bushings are taper reamed, which means the number side should face up when seated in the die. That top side runs slightly smaller than the base, so orienting it correctly matters for consistent results.
Sizing the neck with a bushing keeps the neck more concentric and works the brass less than pulling it over an expander ball. That translates to longer case life and more consistent bullet seating from round to round. It also lets you fine-tune neck tension by simply swapping bushings as your brass or bullet changes.
| UPC | 815145025258 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-335 |
| Shipping Weight | 0.02 |
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