I have a Win M70 375RUM that I would like to set-up for 1,000 yard gongs. It has Leupold 2 piece dual dove-tail rings/mounts. I got the knob that is calibrated for the load/velocity but with the parallel bases the scope (a Leupold VX6 4-24x runs out of adjustment at 450 yards. I sent the scope to Leupold and after checking, said it was fine, that I needed 20 MOA mounts. Problem is the hole spacing on the rear base is .33" and Leupold makes no tilted 20 MOA bases for that receiver. Using the bases that I have, I need to raise the rear ring .0233". If this were a one piece base it would not be a problem because raising the back would tilt both rings, keeping them in line. but with just the rear base being elevated is going to cause the rings to be slightly out of alignment. So I have two questions: Is the angle caused by raising the rear base .0233" sufficient to cause damage to the scope? and Are there any suggestions regarding how resolve this issue, short of seeing if I can find a Talley or Warne or other that has a tilt and fits?