The ForsterForster 8x57mm Mauser Go Gauge is an essential tool for precision gunsmiths and firearm enthusiasts. Designed specifically for the CZZ 8mm Mauser cartridge this Go Gauge ensures that your rifle's chamber is accurately sized for optimal performance and safety. Crafted with high-quality materials it helps determine the minimum chamber dimensions allowing you to verify headspace and ensure reliable firearm function. Whether you're building a custom rifle or maintaining a classic firearm the Forster Go Gauge is a trusted choice for achieving precise chamber specifications.