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The L.E. Wilson Neck Sizing Die Bushing in .247 is the little insert that does a big job on your reloading bench. It drops into a Wilson neck die or a Wilson bushing-type full-length sizing die and sizes the outside of the case neck to a finished diameter of .247 inch, giving you tight control over how firmly the neck grips the bullet. Instead of relying on a one-size-fits-all expander ball, you pick the bushing that matches your brass and bullet combo and let it do the work.
Sizing the neck with a bushing rather than an expander means the brass gets worked less on every cycle. That translates to better neck concentricity, more uniform tension from case to case, and brass that tends to last longer before it needs tossing. For precision loaders and benchrest folks chasing single-digit ES numbers, that kind of consistency is where accuracy comes from. This one is machined from hardened steel, so it holds its dimension through a lot of sizing cycles.
If you're not sure .247 is your number, the math is easy. Measure the outside neck diameter of a loaded round where the bullet sits, then subtract .002 to .003 inch for your tension. You can also calculate it from neck wall thickness: multiply the wall thickness by two, add your bullet diameter, then subtract that same .002 to .003. Keep in mind different brands of brass carry different wall thickness, so a lot that works great in one headstamp may call for a different bushing in another.
Wilson bushings are the interchangeable kind, so building out a small set lets you fine-tune tension across loads, seasons, and brass lots. These steel bushings play nice in Wilson, Redding, Hornady, and RCBS bushing-style dies, but they won't fit Forster or Whidden. Since it's steel, a touch of case lube on the neck keeps things running smooth. Made in the U.S.A. to Wilson's usual tight standards.
It fits the L.E. Wilson neck sizing die and the Wilson bushing-type full-length sizing die, with the die body sold separately. These bushings also work in Redding, Hornady, and RCBS bushing-style dies. They will not fit Forster or Whidden dies.
Measure the outside diameter of a loaded round at the neck where the bullet sits, then subtract .002 to .003 inch for proper tension. You can also calculate it from neck wall thickness by doubling the wall thickness, adding bullet diameter, then subtracting .002 to .003. Since brass wall thickness varies by brand, a size that works in one headstamp may need adjusting for another.
Yes, a light coat of case lube on the neck is recommended with steel bushings to keep sizing smooth and reduce drag. It makes the stroke easier and helps protect both your brass necks and the bushing over time.
A bushing sizes the outside of the neck to a precise diameter, which works the brass less than a traditional expander ball. That improves neck concentricity, gives you more consistent neck tension, and tends to extend brass life. It's a big reason precision and benchrest loaders favor the bushing system.
| UPC | 815145024374 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | B-247 |
| Shipping Weight | 0.02 |
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