Been there, done that. he was talking about a soil auger wasn't he?
Bugs
how to make deep drilling tool?
Feb 09, 2005
22 Replies
If you know any gunsmith, he should be able to show you how rifling was made in pioneer times. It's basically a draw scraper, similar to an adjustable reamer but with a twist built in. It can be pulled through with a piece of all-thread rod and a nut. Bugs
There's always bowling balls:
formatting link
:)
Jon
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