Well, remington finishes the action with a belt sander....and it is never square.....as seen after a skim pass.

So I then finish cleaning up the face and bore it then re cut the threads....

I start this whole rodeo by dialing in on a manson raceway reamer.

Here is the surface lug after I surface ground it.....and a stocker.
And I whipped up a bolt knob for it....
Just another afternoon in the shop....