hey guys i need some help. i just built a 260 rem off a stevens 200 action. i just got my scope today, it's one of the cameraland 279.00 vortex vipers 6.5x20x44. love the scope by the way. i think i need the 30 mm zees but i'm not sure if i need medium or high. can anyone help me out of this because i really want to get this scope mounted and out to the range. what would be a good rail for this also. one piece is what i'm looking at. thanks a lot guys!