Well Lee I am in your same boat. I used the single dot red dot for a long time and just limited myself to twenty yards, and all the deer I ever shot where right under my stand. Then switched to the Horton multi crosshair sight and still stayed to twenty yards since it did not line up right on the thirty and forty yard lines. I now have the Varizone and am dead nuts on with all the ranges but now find myself being paranoid with proper rang judgment. My one hunting spot was laid out like a rifle target with my twenty and thirty yard rings set up around my stand. I marked them with placing sticks in the ground. But I still get paranoid thinking about going past my twenty yard marks. The difference between 25 and 30 on your info is over 2.5 inches and to me being off by five yards would be easy to do and being off by 2.5 inches is unacceptable to me for my game. I may be eating crow and trying a Leupold and staying with twenty again. I always have to many doubts on ranges.