Reloading ammunition requires attention to many critical cartridge dimensions, including case length, neck and base diameters, overall length, primer pocket depth, etc. Verifying these dimensions is quick and convenient with the Frankford Arsenal caliper. They are accurate to within .001". The caliper allow you to measure inside and outside diameters, plus depths. You will find it useful for many measuring tasks on and off the reloading bench.
WARNING: To the state of California, this product is known to have chemicals that cause cancer, birth defects, and harm to the reproductive system.