I have a S&W 460 performance center 10.5". It has the built on rail, and I have purchased a Leupold vx111 2.5-8x32 scope. I purchased med mark 4 rings to mount scope but the front of the scope touches the barel. They do not make the mark 4 rings in high configuration. I called weigand and he said he doesn't have rings for this particular gun. Leupold customer service told me to try prw (high) then another rep told me not use prw because the do not have square ends. Anyway I am real confused on what to get, any reccomendations would be great. I also tried to order warne rings but they are of stock everywhere I checked. Please any help or experience would be great.