The Lyman Rifle Case Length/Headspace Gauge for 350 Legend is an essential tool for achieving the highest degree of safety and accuracy in rifle reloading operations.Lyman Case Length/Headspace Gauge - 350 Legend caliberDual function: checks headspace dimensions and case lengthEnsures cases don't exceed maximum or fall below minimum headspaceIdentifies cases exceeding maximum allowable case lengthSimple go/no-go operation for quick inspectionEssential safety tool for bottleneck rifle case inspectionRecommended for all 350 Legend reloaders this precision gauge eliminates guesswork and helps maintain proper case dimensions after resizing. Always destroy cases found with excessive headspace for safe reloading practices.