I have spent many hours in my buddy Charlie Boswell's machine shop where he makes Comp-N-Choke and Kick's High Flyer choke tubes. I have very little understanding of the machining trade, though I play around with one of his lathes. He has Japanese CNC machines that are made by the same company that makes Citizen watches. These, among other machines there, run all day, five days a week. I texted him yesterday and asked him what tolerances they could hold, and that I thought he once told me .0005". He replied simply, "No, much better than that." Those machines are amazing to stand and watch operate. But, that precision does not come cheap.
SRH
