The Lyman .30-06 Springfield Case Length/Headspace Gauge is an essential precision tool for safe and accurate reloading of .30-06 Springfield cartridges. This gauge ensures proper headspace dimensions are maintained after case resizing for maximum safety and accuracy.Lyman .30-06 Springfield Case Length/Headspace GaugeChecks maximum and minimum allowable headspace dimensionsIdentifies cases exceeding maximum allowable case lengthSimple insertion design for quick case inspectionEssential for safe bottleneck rifle case reloadingRecommended by Lyman for all bottleneck rifle case inspection after resizing. This gauge helps reloaders maintain the highest degree of safety and accuracy by ensuring cases meet proper dimensional specifications before loading.