CLICK HERE: CASE GAGE INSTRUCTIONS
Available now in select calibers, the L.E. Wilson Brass Case Gage is precision machined from U.S. solid brass bar stock. This brass version is an upgrade to our standard steel line, offering excellent corrosion resistance and a smooth surface finish ideal for consistent case measurement.
This one-piece gage checks critical case dimensions including overall case length and datum-to-head length. These measurements indicate when trimming is required and help ensure correct headspace while preventing over-sizing during the reloading process.
Originally designed with safety in mind, the Cartridge Case Gage was invented by our founder, Sam (L.E.) Wilson, in 1935 after assisting a fellow shooter with a case-separation issue. The design allows reloaders to clearly see how much the shoulder is being set back during resizing.
After resizing, brass often lengthens. The Brass Case Gage also checks minimum and maximum case length, helping identify when trimming is required.
Note: This gage does not measure body diameters. It is intended for use with fired cases to establish a reliable baseline for full-length sizing and trimming.