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L.E. Wilson has been machining precision reloading tools for decades, and this 6mm ARC bushing neck sizer is a great example of why benchrest and precision crowds keep coming back to them. Instead of sizing the whole case body, this die works the neck only, using an interchangeable bushing to set the exact amount of neck tension you want. Drop in a smaller bushing for a firmer grip on the bullet, a larger one to ease off, and you can dial your load without buying a whole new die.
The big advantage of the bushing setup is that it eliminates the traditional expander ball. Pulling brass over an expander is one of the main things that introduces runout and works the neck harder than it needs to be. With that step gone, you get better concentricity and your brass tends to last longer, which matters when you are running quality ARC cases. The die sizes the neck down to about 3/16 inch from the case mouth, leaving a portion unsized, which is a method a lot of accuracy-focused reloaders prefer.
This is a hand-die design, so it does not thread into a standard press. You use it on an arbor press with a neck die base, or in a pinch you can tap cases in with a soft mallet. Press the lightly lubed case in until it seats, then flip the die and the decapping rod pushes the case back out along with the spent primer. It is a simple, repeatable process once you get the feel for it.
Bushings are sold separately so you can match them to your exact brass and bullet combo. The quick method is to measure the outside neck diameter of a loaded round and subtract about .002 to .003 inch to get your starting bushing. Wilson bushings come in .001 inch increments, and because they are taper reamed, flipping the bushing over gives you a slightly tighter size. It is worth keeping two or three sizes on the bench so you can test what shoots best in your rifle. Machined from stainless steel and made in the USA, this die is built to hold its dimensions through years of loading.
No, bushings are sold separately so you can match them to your specific brass and bullet combination. To find your starting size, measure the outside neck diameter of a loaded round and subtract about .002 to .003 inch. Wilson bushings come in .001 inch increments, so many reloaders keep a couple sizes on hand to test what shoots best.
No, this is a hand-die design and does not thread into a standard 7/8-14 press. It is meant to be used on an arbor press with a neck die base, though you can also tap cases in with a soft mallet if needed. If you want a die that threads into a conventional press, Wilson makes a full-length bushing sizer for the 6mm ARC instead.
A bushing die lets you control exactly how much neck tension you apply, which is a big deal for precision and consistency. Because there is no expander ball being pulled back through the neck, you get improved concentricity and less runout. It also works the brass less, so your cases tend to last longer.
It sizes the outside of the neck down to roughly 3/16 inch from the case mouth, leaving a small portion of the neck unsized. This is an intentional design that a lot of accuracy-focused reloaders prefer. Keep in mind a neck-only die does not bump the shoulder, so you will want to full-length size periodically as your brass grows.
| UPC | 815145026781 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SND-ARC |
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