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If you're loading for the 6mm BRA, you already know how much the little details matter. This L.E. Wilson Case Gage is one of the simplest tools on the bench and one you'll reach for every time you set up a sizing die or work up a batch of brass. It's a one-piece, precision-machined gage made specifically for the 6mm BRA, the 40-degree Ackley version of the 6mm BR that's become a favorite in the precision crowd for its efficiency and accuracy.
The way it works is about as straightforward as it gets. Drop a fired case in, measure with your calipers or a depth mic, and you can see where the case sits relative to minimum and maximum headspace. The gage also checks overall case length so you know the moment trimming is due. Because it reads off fired brass, you get a true picture of what your chamber is doing, which lets you dial in your full-length sizing die to bump the shoulder back just enough and no more.
Overworking brass is the fastest way to shorten its life, and that's exactly what this gage helps you avoid. By showing you how far you're setting the shoulder back with each pass through the die, it keeps you from oversizing and chasing case head separation. For a cartridge like the 6mm BRA that's often run hard in competition, getting consistent chamber fit and controlling your shoulder bump translates directly to better accuracy and more reloads out of every case.
L.E. Wilson invented the cartridge case gage back in 1935, and the family-owned company has been machining them in the USA ever since. This one is cut from solid steel with milled reference surfaces, no moving parts to drift, and no calibration to fuss with. Keep in mind it checks length and headspace rather than body diameters, so pair it with your calipers and you've got a quick, reliable way to keep your 6mm BRA brass dialed in.
It checks minimum and maximum case length along with minimum and maximum headspace on your 6mm BRA brass. Drop a fired case in and use your calipers or a depth micrometer to read where the case sits in the gage. It does not measure body diameters, so it's focused on length and shoulder-to-head dimensions.
Yes, and that's one of its most valuable uses. By measuring a fired case first, then measuring again after sizing, you can see exactly how far you're setting the shoulder back. That lets you adjust the die to bump the shoulder just enough for reliable chamber fit without overworking the brass.
Correct. This is the CG-6BRA, cut for the 6mm BRA, which is the 40-degree Ackley version of the 6mm BR. The standard 6mm BR uses a different Wilson gage, so make sure you're matching the gage to the chambering you're loading for.
It's designed to be used with fired cases, since fired brass gives you the true picture of your chamber dimensions. That reading becomes your baseline for full-length sizing and trimming decisions. Checking fired cases is how you get the most accurate setup for your rifle.
| UPC | 815145027351 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CG-6BRA |
| Shipping Weight | 0.32 |
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