Exactly, and maybe not even then, as the ballistic doesn't make a huge difference with a rifle as it does with a bow. For bow hunting, you really don't need this type of rangefinder, if you have practiced and shot your bow in a variety of angles nad yardages. I like to know how far from me it is, the arrow still has to travel that distance. Granted, it may pick up a few FPS on that decline it's traveling on since it is working with gravity, not against it, but a few FPS and a little bit higher hit ain't such a bad thing when shooting from a treestand, as we are often more worried about our exit. I'm not sold on them. And yes, that math was right, if he range those differing distances, he was WAY high, or exaggerating to try to sell a product that in all honesty seems more like a gimmick than anything, for archers.