I just read the post on the SBII. It sounds like the Monkey who runs the machine that taps the end of the Barrel for the choke wasn't paying attention to his work.
I gotta really feel for those people with that problem. I would demand a new barrel for sure! :pissed:
If you can visually see that the choke is not concentric with the barrel you got serious problems. Those things are supposed to be held to tolerances that you cannot see with your eye. +or- .005 of an inch and thats alot for a machinist.