L.E. Wilson has been making precision reloading tools for over 80 years. The Case Length Headspace Gauge allows reloaders to measure case length from the base of the cartridge to the shoulder, as well as the maximum case length. This process shows the reloader if ammunition is being produced within specifications.Notes: This is a one-piece, non-adjustable cylinder-type gauge for checking fired and resized cartridge cases for cone-to-head and overall lengthUsed to compare cartridges against the minimum and maximum SAAMI cartridge dimensionsThe item description will indicate if the headspace gauge is AdjustableInstructions: Drop a fired case into the gauge. Take a measurement on headspace. This can be done with either a depth micrometer or caliper (Depending on if the case is sitting high or low in the gauge). If the case sticks out past maximum headspace the firearm probably has a larger than average chamber. The gauge can still be used because it is being used to determine how much...