In the past, I have tried to rebarrel two different A bolt rifles. Both had the same problem. The threads in the reciever are not deep enough, and the factory torques the barrels into the bottom of the thread, which tears up both reciever and barrel. When you try to remove that barrel, the threads gall the whole way out and wreck the reciever threads. In both cases I had to spend a lot of time setting up the recievers to recut those damaged threads in order to fit a new barrel. I will not rebarrel any more A bolt rifles, and refuse to remove the barrels for any reason. Perhaps your gunsmith has encountered this as well. With those rifles, my saying is "It is what it is. Use it and enjoy it, but don't try to make it something it is not."