Trying still to clarify this!!!
So the pads were installed to the receiver via solder and screws...then they were finish machined and so to say "trued up to the bore". Next the bracket was fixed to the rifle. Obviously at this point the mating surfaces on the bracket must have been finish machined to be accepted to the finished pads on the rifle. The complete barreled action must have then been securely held in a jig and the bracket must have been line-bored....that is the only way I see how the bracket/scope could be trued perfectly to the bore and that's why each bracket was so specific to each rifle!!! I feel that my question has not really been answered. I'm not trying to ruffle any feathers here because I have a lot of respect for the people of this forum they are a lot more knowledge than me but I do have a machining background that goes back more than a few years. Please tell me if I am wrong and if I am, why. The manufacturing process I find is most interesting as well...just trying to get a better understanding.
Cheers!!