The Lyman Ammo Checker Single Caliber 9mm Luger Remington is used to gauge and verify the quality and consistency of reloaded and factory ammo. They are machined from solid aluminium and cut with custom tooling to SAAMI minimum chamber tolerances. Drop your cartridge into the gauge and if it fits, it will chamber in your gun.

Each gauge is clearly marked for calibre and is anodized in a bright orange colour so that they will be easy to spot on your reloading bench.