Lyman's Rifle Case Length/Headspace Gauge is essential for ensuring the safety and accuracy of bottleneck rifle cases by checking proper headspace dimensions after resizing.
The gauge is designed for 6.5 Grendel cartridges and helps reloaders verify that cases do not exceed maximum or fall below minimum allowable headspace.
Any cases that exhibit excessive headspace should be considered unsafe and must be destroyed immediately to prevent potential hazards.