The action is a Weatherby Mark V six lug ultralight which had a .257SLR barrel that was very accurate. But I wanted to switch to 6.5mm so I sent it to Pac-Nor to have them chamber it and install the brake. When it came back the brake was in the package instead of installed. There is a new 'smith in town I met at the range so I figured I would give him a little business. I was amazed Pac-Nor turned the thread undersized.
You have no way of measuring the threads so you ASSUME they are undersized...
How many barrels have you threaded again???
