I've never mounted a red dot on top of my .454 Super Redhawk but lately have gotten the itch to do so. Research I've done gives positive feedback for Ultradot, Burris and Aimpoint. I'm sure there are others. The questions I have if anyone has input are - Tube diameter. Many are 30mm vs 1 inch. Is there a benefit or disadvantage to one or the other? - Dot size. My primary purpose will be punching targets between 25 and 50 yards. But I'd like to be able to shoot out to 100 occasionally. What is the most flexible dot size? - Durability. Which brands have the best reputation for not coming apart under severe recoil? As always, thanks in advance for your help and guidance.