If you have a custom yardage dial, that won't work. The MOA dial will, but not yardage.
Please explain as to why.
If you move the dial to 200 yards, and double check your actual zero, all the further distances will still work with the trajectory. You will still have a 100 yard marking, and can either dial down to that, if needed, or replace the zero stop bearing, as described above. You can't sight in at 200 with the dial zeroed at 100 though, or the everything would be high.