Looking to pick up a micrometer with the primary purpose of measuring neck wall thickness of brass, but would also like to use it for other things as well. I was thinking about a Mitutoyo but they have a large variety of anvil styles, tube, ball etc etc. In order to measure the inside of the neck I know I need a round anvil, but would this effect functionality in other types of measurements (as a simple example say bullet diameter or neck diameter)? What micrometers do you guys have and love?