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If you're prepping Winchester Short Magnum brass on a Wilson trimmer, this is the holder that keeps everything lined up right. The NCH-WSM New Case Holder cradles the case by its body taper instead of grabbing the case head, so the brass sits the same way every single time, much like it would in a rifle chamber. That consistent support is what separates a clean, square trim from a wandering cut, and it carries over to primer pocket reaming, neck reaming, and deburring too.
This is the NEW case version, which means it's cut to accept new, unfired brass as well as cases that have already been full-length resized. It covers the whole WSM family, so one holder handles 270 WSM, 7mm WSM, 300 WSM, and 325 WSM since they all share the same case body dimensions. Machined in the USA from steel, it's built to the tolerances Wilson reloaders have trusted for generations.
The case drops into the holder, you give the case head a tap on a firm surface to seat it, and it's ready for the trimmer. When you're done, a light tap on the case mouth pops it free. Because the holder references the body rather than the rim, you get the kind of repeatability that shows up downrange, with uniform case length and square mouths across a full batch.
This holder is designed to run with the L.E. Wilson Case Trimmer, and it doubles as your work-holding fixture for reaming and deburring when used alongside Wilson's Uniform Deburring Tool, which is sold separately. One thing worth knowing: a few rifles with generous chambers may blow brass out far enough that even after sizing it won't drop into a New Case holder, in which case the Fired/Standard version is the better fit. For the vast majority of WSM reloaders working with new or full-length sized brass, this is exactly the holder you want on the bench.
It covers the entire Winchester Short Magnum family, including 270 WSM, 7mm WSM, 300 WSM, and 325 WSM. They all share the same case body dimensions, so this single holder handles the whole lineup. It's designed for new and full-length resized brass in those chamberings.
The New Case version is cut to accept new, unfired brass and cases that have been full-length sized. A Fired holder is sized for neck-sized brass only. If your rifle has a generous chamber and your fired brass won't drop in even after sizing, the Fired/Standard holder is the one to reach for.
Yes, this holder is made to run with the L.E. Wilson Case Trimmer, which is where it does its main job. It also serves as your work-holding fixture for primer pocket reaming, neck reaming, and deburring. Those extra operations pair with Wilson's Uniform Deburring Tool, sold separately.
Referencing the case body taper instead of the rim lets the brass seat the same way every time, much like it sits in a rifle chamber. That consistency is what gives you square case mouths and uniform trim length across an entire batch. It's a big part of why Wilson's system has a reputation for repeatable results.
| UPC | 815145028372 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | NCH-WSM |
| Shipping Weight | 0.2 |
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