Forgive the question because I'm sure this one has been asked 1,000 times. This rifle was formerly a .243 Win. and I have rebarreled it for 6.8SPC I need to tweak the feed lips inward to enable more reliable chambering.

My fabbed feed lip tool would work flawlessly if I could use it. The problem is I don't think I can remove the Box mag from the action. I have found through some internet searches that this is very common among shooters who try to do their own work. The way that the box is retained on the Savage 10 Action makes it pretty difficult to remove without deforming the box and would rather not mess it up. Instead I think I'm going to try a different approach and use some sort of plate placed on the lips and press them down and tweak them that way? any other ideas?