You might not have to move the box back. I have a centerfeed model that I was looking at maybe putting a 300 Weatherby or 7STW barrel on. I was test fitting a 300 Weatherby round in it and it will clear the feed ramp in the front of the action with the box in it's current position. It just needs a notch cut out in the front of the box for the nose of the bullets to stick through. By the way geargrinder, thanks for clarifying the differences between the Remington and Savage. I thought after I asked that the screw spacing may have something to do with it, albeit the bolt stop problem, like you said can be fixed with a RUM baffle. I think Savage changed the screw spacing on the Lapua model and that's probably why.