Using the bullet weight and description, and the velocity mentioned, I went to JBM and prepared a quick 100-1000 yard come-up series. We're talking about a 6.5mm (.264) 131gr HH with a claimed G7 BC of .255 and an MV of 3700. At sea level, 59F, 0%humidity and 29.92 hg pressure, with a sight height of 1.5 inch we have as follows:
100 - 0 MIL
200 - 0.1
300 - 0.4
400 - 0.9
500 - 1.3
600 - 1.9
700 - 2.4
800 - 3.1
900 - 3.8
1000 - 4.6
So, what I would do is zero the rifle at 100 yards. Once there, I would reset the elevation dial cap to have the 0 located at 6 o'clock. I would dial in the 0-set to that point. Now, when I want to shoot at 500 yards, I dial the elevation to 1.3 MIL. If I want 900 yards, I dial to 3.8 MIL. If I want to go back to 200, I dial back to 0.1 MIL. From 0 to 1000 yards, if I have the load right and the ballistics proper, these distances can be all covered by less than 1 half turn of the elevation dial. This could not be simpler. Forget about centimeter and inches and conversions., just think MIL number.
If we were doing this in MOA, it would go from 0 to 15.75 MOA for the same distance.
