The Lyman Pistol Maximum Cartridge Gauge for 9mm is an essential reloading tool designed to ensure proper case dimensions for reliable ignition improved accuracy and greater safety during the reloading process.Lyman Pistol Maximum Cartridge Gauge - 9mm CaliberVerifies proper cartridge case dimensionsEnsures reliable ignition and improved accuracyEnhances safety during reloading operationsPrecision-manufactured for consistent resultsThis gauge is an indispensable tool for serious reloaders who demand precision and safety in their 9mm cartridge preparation helping to identify potentially dangerous oversized cases before loading.