The Multi-Purpose Overall Length Gauge is a very versatile and handy tool to have on your reloading bench. The gauge can be used to measure the length of your loaded round from the ogive. It can be used to measure fired or unfired brass from the Datum line. It can also be used to measure or compare individual bullets from the ogive. All you need is a set of Calipers and any number of our standard bushings for your calibers.