TBM: Since you are from Texas, I can tell you a place NOT to go and that's Briley's in Houston. I had a M12 that didn't seem right. (I couldn't hit a dove with it). I took it to Briley's an they told me to pattern it and bring it back. When I did, I learned that it's patterns were hitting consistently high and left. I took the data back to Briley's and they said I needed new choke tubes (which cost big $$$).
I really didn't want choke tubes so I looked around a while, thinking that the barrel must be bent and needed to be straightened. Finally took the gun to another 'smith who noticed that the front sight bead was off center. For $50 he fixed it and the gun shoots great.
Needless to say, I won't be visiting Briley's for a while...
But to answer your question, I never found anyone who would "straighten" shotgun barrels.
Jim
