The Lyman Pro Ammo Checker for 6.5 Creedmoor is precision machined from corrosion resistant stainless steel to minimum SAAMI chamber tolerances. This essential reloading tool ensures your ammunition will chamber smoothly and reliably.Lyman Pro Ammo Checker - 6.5 Creedmoor CaliberPrecision machined stainless steel constructionBuilt to minimum SAAMI chamber tolerancesClearly marked caliber identificationSimple drop-in gauge testingCorrosion resistant finishA must-have final check for competitive shooters and reloaders who demand trouble-free chambering. Simply drop your loaded cartridge into the gauge - if it fits it will chamber in your firearm.