BOSS COMPONENT Single Stainless Steel Case Gauge Ammo CheckerSingle Stainless Steel Case Gauge Ammo Checker Looking to check your ammo quickly and efficiently? Look no further than the 9mm 38 Super . 40 Cal Single Case Gauge Ammo Checker! This innovative tool is perfect for IPSC and USPSA competition shooters who need to check their ammo quickly and easily. Simply insert a fully assembled round into the gauge and this will then let you verify your ammunition as quickly as possible, so you can avoid any