Sounds like an interesting project
Two Bears. A full stock, octagon barrel, ball shooting in-line would sure be unique. If you undertake the project be sure to take lots of pictures from start to finish.
I built a .32 cal ML barrel that fits a H&R handi frame. Used an 8mm Mauser barrel and the rear part of a H&R shotgun barrel. Larry
More
Larry, more. You need to start a new thread on that project. How did it work out? Pictures!!!! What loads did you try?