Bob,
If the barrels are not choked and you want more than you can get from a "Jug choke", there is another possibility. Many years ago, I had a friend whose father made a lot of money in local turkey shoots. He bought cheap single shot guns and by turning the barrels in his lathe while "crowding" the muzzle with a smooth tool in the compound slide. Thid swaged the barrels to some supper full choke. The patterns would not be uniform but would have an area, somewhere, of concentrated shot. since he knew where this area was, he would win most times. Pretty soon someone would offer him a lot of money for the gun, and he would sell it. He would then get another gun from his truck and start over again. Depending on the lathe you have, you might be able to swage chokes into the barrels before you put them together.
On a different thought, Heym made me a set of shotgun barrels for an O/U I had. I watched Rudi Henneberger and Helmut Kerner adjust the POI so the barrels would impact together. They used a reamer with a long handle which one of them turned at the chamber end, while the other one "crowded" the cutting end of the reamer over in the required direction. You might find either or both of these ideas helpful.
Mike
Last edited by Der Ami; 06/05/24 12:43 PM.