If you want to get your hands on the reloading calipers for your reloading work, it is always better that you get the calipers that range from 0 to 6 inches. Precisely, the range of them should be from 0mm to 150 mm. These are the best suit for the reloading work. With such calipers, you will get an outside jaw depth. The depths will range from 1.5 inches or so. On the other hand, the inside jaw of the reloading caliper will be 5.8 of one inch.