I'm kinda scratching my head. I have a one pice pic rail for my Remington 700 sa. I went to put it on and only 3 screw holes line up. I looked at the package and it says it's for a short action. Am I missing something or do you only use three of the holes. There's four holes in the base I have a long action but I don't want to pull the scope off to see if it fits. ????????