I also had problems with my T/C and it could have been the barrel. Ended up ordering a custom barrel that shoots fairly well but no tack driver yet. I’m still breaking in the barrel. I could never understand what the pin would have to do with the accuracy of the rifle. The thing is that the scope is mounted on the barrel as one unit, so why would the pin create a problem once the action is closed. I know that my rifles pin is snug because I have to tap it into place but I have never measured the difference between the pin and the holes. All I would say is to shoot it first and then send it in for any problems as previously mentioned.