"spun it on the lathe for a damaged choke on a 16gs SxS. Measured the bore, subtracted .050" and made the tool. Quite easy if you have a lathe."

And a milling machine to get the slant perfect.

For professionals that do this all the time, that is the best way, but for hobbyists like myself I do not want to spend $400+ for one.
My way works great.



David