The Sinclair Chamber Length Gauge allows handloaders to measure the true chamber length from the bolt face to the chamber's neck end, revealing excess case length over published trim lengths.
Made of 12L14 soft steel, the gauge is inserted into a fired case and chambered to measure overall length without damaging the chamber, and includes step-by-step instructions.
It is important to note that the 22 caliber gauge is not suitable for thin-necked cases like the 22 Hornet, and the 30 caliber gauge cannot be used for the 30-30 Winchester.