I just bought a Chapuis .450/400 3 inch, I love it. Getting ready to go on a Cape buffalo hunt with some plains game on the side. Now I'm going to use the irons for buff, but I had a Trijicon RMR mounted for longer shots, like 75-100 yards and wanted the RMR for more precision shooting. Here's my question, would you sight it in to just one barrel for really precise shooting or split the difference between the barrels?