Parashooter wrote on Mar 21^st, 2019 at 11:10pm:

Adding up the MOA values for all the graduations from 200 to 600, we get a total of 16.5 MOA. Looking at the ballistics for a BC ~.500 bullet at ~2650 fps, we find we'll need to come up about 36.5 MOA from 200 to 1000. Since the 600-yard setting gets us only to 16.5 MOA, we get the remaining 20 MOA with a shorter front sight. One MOA change requires a .008" change of the sight, so .008" x 20 = .16". You'll need a blade about that much shorter than your existing one. That will look pretty short compared to the issue blade. Now you can check the new blade at 100 yards by setting the elevation to 600 and looking for a group ~39" above center bull - or ~74 at 200 (presuming a MV near 2650 fps and BC near .500.). If using a 6:00 hold at 100, use a 4.4" aiming black to emulate the size of the 44" LR target black at 1000 yards. At 200, use 8.8" bull.

Ok, I've shortened the spare blade by 0.16.  The standard blade height on my 03A3 is 1.496, and the height with the reduced blade is 1.351.  I'll sight it in using the 600 yard setting at 100 yards using Para's calculations.  Hopefully, I'll be close and won't need to file it down too much more!