I recently bought a Millett LRS-1 with 140 MOA range. I have contacted a company about getting a more than 25 MOA base made. They asked me how much bigger, and I honestly didn't know. The scope will be on a .22LR that will be used as a trainer. I want to zero at 50 yards, and go out as far as I can. How much base do I ask for in relation to the overall adjustments of the scope?