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Anybody running a 6mm BRX knows the cartridge rewards consistent brass prep, and that starts with knowing exactly what your resizing die is doing to each case. The L.E. Wilson 6MM BRX Case Gage is a one-piece machined gage cut specifically for the BRX, giving you a fast, repeatable reference point for both overall length and datum-to-head length. Drop a case in, run a straightedge across the top, and you can see at a glance whether that case needs trimming or whether your die is pushing the shoulder back too far.
The real value here is controlling shoulder bump. The idea is to measure a case in its as-fired condition first, then size it and drop it back in the gage to see how much you moved the shoulder. Most reloaders chasing accuracy on a BRX want somewhere in the neighborhood of .001 to .004 of setback, and this gage gives you a clean baseline to dial that in. Keep the bump minimal and your brass stays closer to fire-formed, which means longer case life and tighter, more uniform chambering.
On its own, the gage checks min/max case length and gives you a go-by for trimming. Pair it with the L.E. Wilson Case Gage Depth Micrometer (sold separately) and you've got a genuinely precise way to measure headspace before and after sizing without reaching for calipers or clamp-on comparators. The micrometer slips over the top of the gage with your case inserted, and the reading takes a lot of operator feel out of the equation.
L.E. Wilson has been building case gages since 1935, and this one carries that same no-nonsense reputation. It's a solid, caliber-specific tool with no moving parts to wear out or go out of spec. One note worth knowing: this gage checks length and headspace, not body diameter, so it's meant to be used with fired brass as the starting point for your sizing and trimming routine. For a precision cartridge like the 6mm BRX, that's exactly the kind of feedback that keeps your reloads honest.
Start by dropping a fired case into the gage and taking your baseline reading. Then resize that same case and place it back in the gage to see how much the shoulder moved. Adjust your die until you get the shoulder bump you're after, which for a BRX is usually in the .001 to .004 range. This keeps your brass close to fire-formed without over-sizing.
No. This gage is built to check overall case length and datum-to-head length, not body diameters. It's designed to be used with fired cases to give you a reference point for full-length sizing and trimming. If you need to check body diameter you'll want a different tool.
Yes, and a lot of precision handloaders do exactly that. The L.E. Wilson Case Gage Depth Micrometer (sold separately) slips over the top of the gage with your case inserted and gives you an exact headspace reading before and after sizing. It's a very repeatable way to measure shoulder bump without relying on calipers.
It's best to use the gage cut specifically for your cartridge. While the BR family shares a parent case and shoulder angle, the BRX has its own case geometry, and this gage is dimensioned for the BRX. Using the correct caliber-specific gage gives you accurate, trustworthy readings.
| UPC | 815145027368 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CG-6BRX |
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