Lyman Ammo Checker .300 AAC Blackout - 7833023

The Lyman Ammo Checker is an aluminum gauge designed to verify the quality and consistency of both reloaded and factory ammunition by testing chamber fit. Machined from solid aluminum and cut to SAAMI minimum chamber tolerances, it allows shooters to quickly verify that cartridges will chamber properly in their firearm. Simply drop the cartridge into the gauge to confirm compatibility.