I think this is the formula that I was using in my original post. I printed up some one inch targets to take to the range next week. I am going to try to start out on the 25 yard range with the 0.0 blade and go from there. Then I'll move to 100 yards. Once I have established what I believe is a good 200 yard zero at 100 yards (2-3 inches high) then I'll drop the rear sight those last 3 clicks to see what happens. Hopefully that will put me right on at 100 yards. I won't be able to test out an actual 200 yard range until I travel this fall to New Mexico.