So I gather from things I've read that the receiver bolt bore on model 700s isn't always straight nor are they necessary the same diameter all the way through. There is as much debate as to which is best but whatever method doesn't figure into my question I don't believe.
Then the bolt is trued by whatever means the gunsmith deems best. Again, I don't think this figures into my question.
So. After truing the action face, lugs and threads are all concentric and parallel/perpendicular to one another. And the bolt lugs and bolt face are parallel and perpendicular to the bolt body. Or at least that's the idea. Let's assume those conditions exist after truing.
My question is, when the bolt is inserted in the receiver and closed what is the method to verify that the bolt face is parallel to the receiver face and thereby parallel/perpendicular to all the other trued surfaces? I've searched quite a bit and I'm not able to find any explanation so that's why I'm asking here. If anyone can enlighten me or point me to a reference of some kind I'd really appreciate it.
Thanks for looking.