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If you run an L.E. Wilson Case Trimmer and load for the 8x57mm Mauser, this is the holder that keeps your brass square to the cutter. It's machined to grip the case by the body, much like a chamber does, so the case stays in perfect axial alignment while you trim. That alignment is the whole reason the Wilson trimming system has such a good reputation for turning out uniform case lengths, and the holder is a big part of it.
The 8mm Mauser is a tapered case, which is exactly why Wilson makes separate holders for it. This FIRED model is bored slightly larger inside to fit cases that have been fired and neck sized, so the neck still protrudes far enough for the cutter to do its job. If you full length size your brass back down toward factory dimensions, the NEW holder is the better match, but for neck sized or once fired brass that stays close to your chamber, this is the one you want. Plenty of handloaders who neck size only reach for the fired holder as their everyday choice.
Using it is straightforward. Drop your case into the holder, give the head a light tap on the bench so it seats snug against the taper, then set it in the trimmer. The case grips by friction, so keep the holder pushed back against the micrometer adjustment rod and you'll hold your trim length tight and consistent. When you're done, a quick tap on the case mouth pops it right back out. Keep the bore clear of brass shavings and your cuts stay dead square.
L.E. Wilson has been a family run shop since 1927 and has been building case trimmers and holders since the 1930s. This holder is turned from polished steel, made in the USA, and it can do double duty for primer pocket reaming, neck reaming, and deburring when paired with Wilson's uniform deburring tool. It's a simple, well made piece that earns its keep on the bench.
The FIRED holder is reamed slightly larger inside to fit fired and neck sized brass, which tends to run a touch fatter than new cases. The NEW holder is sized tighter for unfired brass or cases brought back down with full length sizing. Since the 8mm Mauser has a tapered body, Wilson makes both so the neck protrudes just right for trimming.
Go with this FIRED version. Wilson specifically lists the FIRED case holders as the ones for neck sized cases, and most handloaders who neck size only use the fired holder as their go to. If you full length resize instead, the NEW holder is the better pick.
Yes, the case holder is designed to work with the L.E. Wilson Case Trimmer, which is sold separately. The holder itself just cradles the case in alignment with the cutter. It can also be used for primer pocket reaming, neck reaming, and deburring if you pair it with Wilson's uniform deburring tool.
Tap the case head lightly on the bench so it seats firmly against the holder's taper before trimming, then keep the holder pushed back against the micrometer adjustment rod while you cut. Clearing brass shavings out of the bore between cases also helps keep every cut square. Those small habits are what give the Wilson system its reputation for tight, repeatable case lengths.
| UPC | 815145020826 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CH-8MAUS |
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