A case gauge, such as the ones by L.E. Wilson, is an essential tool for checking ammunition. It quickly verifies whether a cartridge or case will fit your rifle’s chamber, saving handloaders time and frustration at the range. To ensure accurate measurements, follow these simple rules:
Handloaders typically use two gauges: a case gauge for checking case dimensions and a cartridge gauge for inspecting loaded cases. Both can assess chamber fit, but only a cartridge gauge checks the entire cartridge, including the bullet. The choice between them is yours, but a case gauge is a minimum requirement as it checks measurements that calipers can’t easily handle.