Amen brotherI shoot highpower so go through a barrel a year and like any kind of metal and wood work so I purchased chamber reamers and ect. about year 2000 and have contoured and threaded and chambered my barrels since then. its another rabbit hole, and lots of new ways to make a mistake. I think there is a lot less black magic to putting them on and really its not that difficult. if you want to try something hard take a piece of wood and try to fit an action and barrel in it perfectly.
I'm really wondering about if I can sell a rifle that I've re-barreled, if I have to have an ffl or????