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If you're loading .308 Win and want to stop guessing at your shoulder bump, the L.E. Wilson Brass Case Gage takes the mystery out of it. This is the brass version of Wilson's time-tested design, machined from U.S. brass bar stock as an upgrade to their standard steel line. Brass brings good corrosion resistance and a clean surface finish, which makes it a pleasure to work with on the bench. Drop a case in, read where it sits relative to the gage steps, and you've got a fast, repeatable baseline for headspace and overall length.
This one-piece gage does two important jobs. It checks overall case length so you know when it's time to trim, and it reads the datum-to-head dimension so you can confirm correct headspace and avoid over sizing. The smart way to use it is to measure a case in as-fired condition first, resize it on your current die setting, then drop it back in to see exactly how far you pushed the shoulder back. From there you adjust the die to land on the shoulder set back you want. One thing worth noting up front: this gage does not measure body diameters, so pair it with a caliper or the Wilson Case Gage Depth Micrometer when you want exact numbers.
The Wilson Cartridge Case Gage isn't some new gimmick. Sam (L.E.) Wilson invented it back in 1935 after a fellow shooter came to him trying to solve a case-separation problem, and the basic idea has been keeping brass safe and consistent ever since. Over sizing is one of the most common mistakes in reloading, and it quietly shortens case life while setting up potential case head separation down the road. This gage lets you see what your die is really doing instead of hoping for the best.
It's a simple tool that earns its spot in the loading box. If you run a .308 and want straighter, longer-lasting brass with ammo that chambers the way it should, this is one of those pieces of gear you'll reach for every session. Made in the USA.
Measure a fired case in its as-fired condition and note where it sits in the gage. Resize the case on your current die setting, then drop it back in to see how far the shoulder was bumped. Adjust your sizing die until you hit the shoulder set back you want, and use the gage steps to confirm the case still falls within the correct length and headspace range.
The brass version is an upgrade to Wilson's standard steel line, machined from U.S. brass bar stock. Brass offers good corrosion resistance and a nice surface finish for gaging your cases. Functionally it checks the same overall length and headspace dimensions as the steel model.
No, this gage does not measure body diameters. It is built to check overall case length and the datum-to-head dimension for headspace. If you need to check case body sizing, you'd want a separate tool designed for that purpose.
The gage gives you a quick visual reference on its own, which is plenty for confirming cases are in spec. For exact numbers, pair it with a caliper or the L.E. Wilson Case Gage Depth Micrometer. That combination lets you track shoulder bump down to precise measurements as you fine-tune your die.
| UPC | 815145028624 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CGB-308W |
| Shipping Weight | 0.7 |
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