Or you could sell all that stuff, including your present rangefinder and purchase a G7 rangefinder
that measures angle, along with atmospheric conditions, and gives you a correct shoot-to range. If you are an MOA shooter, you can get corrections expressed in MOA. It's much faster than any cheat sheet I've ever used. Very happy with the G7 unit. You can do a search on it here at LRH.
I have a NIB ACI I would like to sell, if anyone is interested.