To achieve the highest degree of safety and accuracy, Lyman recommends that all bottleneck rifle cases be inspected after resizing to ensure that the proper headspace dimension is maintained, and the best way to check this critical dimension is with a Lyman case length/headspace gauge. The reloader simply inserts the case into the gauge to insure that it does not exceed the maximum or fall below the minimum allowable headspace, and the gauge will identify a case which exceeds the maximum allowable case length.
Crafted from durable steel, this Lyman gauge offers lasting value for reloaders. The knurling prevents slipping from your hands, the gauge is very easy to use and checks both head space on one end and overall length from the other, and it also tells you the minimum and maximum case length. It’s a very necessary tool if you reload to make sure the shells will properly chamber in your gun every time without pressure issues, and it improves reloading safety by avoiding potential overpressure situations caused by improper headspace.
