Lyman® Chamber Checker

• Quickly confirms whether ammunition will fit in your gun's chamber
• Machined from aircraft-grade aluminum for extreme durability
• Cut to SAAMI minimum chamber dimensions
• Easy-to-read engravings display cartridge

Lyman®'s Cartridge Checker quickly confirms whether your ammunition will fit in your firearm's chamber. Machined from solid blocks of 6061-T6 aircraft-grade aluminum and cut to SAAMI minimum chamber dimensions. Simply drop your loaded round into the checker and if it fits into the gauge, it'll fit your firearm. Each cartridge is clearly engraved on the gauge. One gauge works with a variety of cartridges. 

Pistol/Revolver: (fits .380 auto, 9mm Luger, .38 Super, .40 S&W, .45 ACP, .38/.357, .44 Mag./Special, .45 Colt®)
Small Rifle: (fits .204 Ruger, .22 Hornet, .223 Rem, .22-250, .300 AAC Blackout, 7.62x39mm) (not shown)
Large Rifle: (fits .243 Win, .270 Win, .30-30 WIn, .308 Win, .30-06, .300 WSM) (not shown)