Here's my situation, I have a Remington 700 Varmint in 6mm with a Zeiss Conquest HD5 5-25x50. I ordered the Larue one piece 20moa picatinny rail and the Leupold mark 4 medium rings for it. I get everything mounted and go to zero the gun. Its probably 8 inches high at 25 yards with no more down adjustment. I sent back the 20moa rail in exchange for the 0 moa, I go back out to the range and I'm STILL 3 inches high at 25 yards with no more down adjustment. I know the Zeiss scopes only have 68 MOA adjustment but I wouldn't think I couldn't zero? I'm an amateur, PLEASE HELP.