Quality assurance gauge for .243 Win, .270 Win, .30-30 Win, .308 Win, .30-06, and .300 WSM. Machined from aircraft-grade aluminum with bright orange anodizing. Verify chamber fit for reloaded and factory ammunition.
The Lyman Cartridge Checker is an essential tool for any serious reloader or ammunition inspector. This precision gauge allows you to quickly verify that your loaded rounds—or factory ammunition—will chamber safely in your rifle.
Machined from solid 6061 T6 aircraft-grade aluminum, the Cartridge Checker is built to exacting standards. Each gauge is cut using custom tooling to SAAMI minimum chamber dimensions, ensuring accuracy and reliability.
Simply drop your loaded round into the appropriate caliber opening. If the round fits smoothly into the gauge, it will fit into your rifle's chamber. This straightforward go/no-go verification takes seconds and eliminates guesswork.
One gauge covers six popular rifle calibers:
Whether you're a precision reloader or simply want to verify ammunition quality before shooting, the Lyman Cartridge Checker is an inexpensive insurance policy for safe, reliable shooting.