The Sinclair Chamber Length Gauge allows handloaders to measure the true chamber length from the bolt face to the chamber's neck end, revealing potential excess case length over published trim lengths.
Made of 12L14 soft steel, the gauge is designed to avoid damaging the chamber and comes with step-by-step instructions, suitable for repeated use.
Compatibility restrictions include the 22 caliber gauge not working on thin-necked cases like the 22 Hornet and 218 Bee, and the 30 caliber gauge not fitting the 30-30 Winchester.