I would be doing it to save weight, not to do anything with point of impact. I think I can get 2ozs out of it. Then you would get to remove 2oz from the stock, and all of a sudden you have shaved a quarter of a pound.
8bore-
Your post triggered something I had not thought of-I wonder if that rib is hollow? I am assuming it is solid. Does anyone know how Italian brazed ribs are profiled? Looking at th eend of the rib, it appears to be solid. If there is a plug brazed in there, then they did an awesome job of fitting it to where no line would show.
As far as the actual set up, i really do think I know how I could set it up and take the rib down. It is limited by the diameter of the mill and the profile of the barrels as they approach the rib. I would start with a brand new carbide end mill and never move the barrels from the original set up.
