RE: Built in rangefinder in a sight???
These were on bowsites 20 years ago. i think you all know how different body size can be for a deer. If you can't judge the distance well enough from 10-40, then practice that. Educated guessing would be better than that IMHO. This, of course, is only if you do not have time to use your range finder. I know I use a 1 pin slider and leave it set at 25 yards. i practice out to 40 with that and know how far to raise/lower for the shot if i do not have time to move the slider. Has not been a problem since switching to this bow for the last 3 seasons. I chalk this one up to snake oil, lol.