I have practiced at 50-60 yds, but for me an ethical shot is 40 yds or less. There are just too many unknown factors that can come into play and you end up delivering a poor shot and wounding an animal. A gust of wind, a twig you really couldn't see, something else making a noise that causes the animal to move, or the animal just moving on its own. I have seen to many folks make poor shots for whatever reason and never recover their deer. It is hard to say for what reason they made a poor shot due to the fact we don't sit with the clients. We always let them target shoot before they actually go out to hunt if they want and we encourage them to do so. Due to the fact that anything could happen in travel that could throw your shot off.