Lyman's Small Rifle Cartridge Checker gauges ammunition fit for .204 Ruger, .22 Hornet, .223 Remington, .22-250, .300 AAC Blackout, and 7.62x39. Machined from aircraft-grade aluminum with bright orange anodizing.
The Lyman Cartridge Checker is an essential tool for any reloader who demands precision and consistency. This gauge allows you to quickly verify that your reloaded ammunition—or factory rounds—will chamber properly in your rifle before firing.
Simply drop your loaded round into the appropriate caliber slot. If the cartridge fits into the gauge, it will fit into your rifle's chamber. This quick verification step catches potential problems before they reach the firing line, protecting both your firearm and yourself.
Machined from solid blocks of 6061 T6 aircraft-grade aluminum, the Lyman Cartridge Checker is built to exacting standards. Each gauge is cut using custom tooling to SAAMI minimum chamber dimensions, ensuring accuracy that you can trust.
Whether you're a seasoned reloader or new to handloading, the Lyman Cartridge Checker is a simple, reliable way to ensure your ammunition meets chamber specifications.