thanks fastgame and fitasc for your thoughts. my gun shoots tight patterns for sure. I did get a new buffer in it.
.... I was hoping to get a barrel from nuline. but they say they are too busy to rib it and open up the choke.
....I might just have to send it off to some one else for the additional work. the existing barrel works for my trap shooting and I am reluctant to risk changes to it. bobn