Lyman .338 Lapua Magnum Rifle Case Length Headspace Gauge

To ensure optimal safety and precision, Lyman advises inspecting all bottleneck rifle cases post-resizing to verify the correct headspace dimension is maintained. The most effective method for assessing this critical dimension is by utilizing a Lyman case length/headspace gauge. The reloader inserts the case into the gauge to confirm it neither exceeds the maximum nor falls below the minimum permissible headspace. Additionally, the gauge will detect any case that surpasses the maximum allowable