The Sinclair Chamber Length Gauge allows handloaders to measure the actual chamber length from the bolt face to the chamber's neck end, helping determine excess case length.
It is made of soft 12L14 steel to avoid chamber damage and comes with step-by-step instructions, providing reusability for consistent measurements.
Not suitable for thin-necked cases like the 22 Hornet or 218 Bee, nor tight-necked chambers, except the G-243T, and should not be used in handguns or certain rifles.