Fullsize image: https://s3-us-west-1.amazonaws.com/h...e_fullsize.jpgQuote:
Machining the bore of a 5" naval gun, U.S. Naval Gun Factory, Washington Navy Yard, 1917
https://s3-us-west-1.amazonaws.com/h...l_gun_bore.jpg
Previously:
https://www.homemadetools.net/forum/...110#post130188