Hello , as I progress in preparing to produce my first 9mm reloads , I come to realize that i will need to buy a micrometer to measure the length of the case as well as the entire finished bullet. I went to the hardware store and checked out a few. The only problem is that I can't figure the darn thing out. So I didn't buy one. So now im gonna research micrometers . Any simple suggestions ? I was thinking of just measuring a factory round and adjusting to that .