I asked the same thing on ranging coyotes with mil dots, and most said that from the top of their back to their chest is about 11". The one I measured confirmed that. With one mil being 3.6" at 100 yards, 11" = 305 yards.
I do agree that a range finder is the the best, but, if a broadside coyote is bigger than 1 mil, you know it's closer than 300 yards. HTH
