Evolution Gun Works 4 Caliber Auto Case Gauge Ammo Checker - 9mm/.40 S&W/.45 ACP/.38 Super

The Evolution Gun Works 4 Caliber Auto Case Gauge Ammo Checker is a precision case gauge (EGW part EGW70100) that lets handloaders and pistol shooters quickly verify ammunition and resized brass against SAAMI minimum spec across four of the most popular auto-pistol cartridges: 9mm Luger, .40 S&W, .45 ACP and .38 Super. Instead of buying a separate checker for each caliber, all four chambers are cut into a single compact block, so you can sort factory ammo or troubleshoot reloads with one bench tool.

The body is machined from solid 6061 T6 aircraft-grade aluminum and finished in a durable anodized matte black, giving the gauge a heavy, stable feel on the bench and the wear resistance to live in a reloading drawer. Each chamber is cut to SAAMI minimum dimensions, so a cartridge that drops in fully is dimensionally safe to fire, while one that sticks or will not seat tells you the case is over-spec and needs to be trimmed, re-sized, or rejected before it ever goes into a magazine.

Using it is simple: drop a finished round or a resized case into the matching caliber hole. If it falls all the way in, the case diameter, length and overall dimensions are within SAAMI minimum spec; if it hangs up, the brass is out of spec and should be re-worked. Proudly made in the USA by Evolution Gun Works.