Lyman recommends that every bottleneck rifle case be checked after resizing to guarantee that headspace remains accurate for both safety and performance. Lyman's case length/headspace gauge offers a quick, reliable way to check the critical headspace dimensions. Simply insert the resized case, and the gauge will confirm that the headspace is within the specified tolerances. It will also identify cases that exceed the maximum allowable length. Cases with excessive headspace should be destroyed immediately to ensure safety. Lyman's case length/headspace gauge eliminates guesswork, offering precise, dependable measurements for reloaders.

• Verifies case headspace
• Detects instances of prolonged duration