Bought a used 30-30 reamer off the forum here a few years ago and recently picked up a $20 barrel to practice on.
Barrel is a Rem 700 take off chambered in 30-06. I measured the .415 base on the 30-30 and needed to cut off the 30-06 chamber at the shoulder so it would clean up when I chambered it.
https://i.imgur.com/DIBrnlg.jpg
https://i.imgur.com/VzIVPd8.jpg
Turned a .300 tapered rod and used that to dial in the bore with the 4 jaw at the chamber end and a spider at the muzzle end.
https://i.imgur.com/tdOYJfj.jpg
https://i.imgur.com/8o1lEYJ.jpg
Changed to using copper shims in the 4 jaw then started turning the O.D. to be concentric with the bore.
https://i.imgur.com/GscYHwU.jpg
Put the Logan in back gear, threaded 18 TPI and chambered to headspace on the shoulder with a .002 gap to the rim.
https://i.imgur.com/tT7n0qO.jpg
The barrel was indexed upside down so the roll markings are under the stock. Redrilled the front sight after it was on the action and installed in the stock.
https://i.imgur.com/9KWukyH.jpg
https://i.imgur.com/2JHWCfz.jpg
Turned out to be a worthwhile project and a good confidence builder.