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Neck tension is one of those things that separates a decent handload from a great one, and the L.E. Wilson Steel Neck Sizer Die Bushing .325 is how you take charge of it. This is a drop-in insert, part number B-325, that sizes the outside of your case neck to a .325 inch finished diameter. It replaces the guesswork of a one-size-fits-all expander ball with a repeatable, measurable amount of grip on the bullet. Machined from heat-treated steel, it holds its dimension through cycle after cycle of sizing.
Wilson makes these bushings in .001 inch increments, and selecting the right one is simple once you know the trick. Measure the outside neck diameter of a loaded round with a micrometer, then subtract .002 to .003 inch. Because brass springs back a little after sizing, that math leaves you with roughly .001 to .002 inch of actual neck tension on the bullet. If your loaded round mics around .327 to .328, the .325 bushing lands you right in that sweet spot. Keep in mind that different brands and lots of brass vary in neck wall thickness, so it pays to measure your specific brass.
This bushing drops freely into any L.E. Wilson bushing-type neck sizing die or Wilson bushing-type full-length sizing die, with the die body sold separately. It also plays nice with Redding, RCBS, and Hornady bushing dies, though it will not work in Forster dies. Since these are steel bushings, a touch of case lube on the neck keeps things running smooth and protects the finish.
Consistent neck tension is a cornerstone of accurate bench rest and precision loads, and swapping bushings is the fastest way to tune it. Building a small set in .001 increments lets you chase the exact grip your rifle likes as your brass work-hardens over its life. It is a small, affordable piece of kit that earns its spot on the bench.
Measure the outside neck diameter of a loaded round with a micrometer, then subtract .002 to .003 inch from that figure. That accounts for brass spring-back and leaves you with about .001 to .002 inch of neck tension on the bullet. If your loaded round measures around .327 to .328 inch, the .325 bushing should put you in the right range, but check your specific brass since neck wall thickness varies by brand and lot.
It drops freely into any L.E. Wilson bushing-type neck sizing die or Wilson bushing-type full-length sizing die. These bushings also fit Redding, RCBS, and Hornady bushing dies. They will not work in Forster dies, and the die body itself is sold separately.
Yes. Because this is a steel bushing rather than a coated one, a light application of case lube on the neck is recommended. It keeps the sizing stroke smooth and helps protect the bushing's finish over time.
You can. Flipping the bushing over so the markings face toward the case lets you take advantage of the slight taper, giving a touch tighter sizing. It is a handy trick for fine-tuning or when work-hardened brass starts springing back more than usual.
| UPC | 815145025159 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-325 |
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