ORIGINAL: Challynger For fun at the range it's fine, but taking a shot at a running deer... seems a bit unethical if you ask me. I wouldn't do it. Maybe a walking deer, definately not a running deer.
By clattin taking the time and putting forth the effort, he is removing the "unethical" part of the equation. He is attempting to practice the shots necessary to hit a running deer. Much the same as guys who sit at a bench ad shoot at a stionary target, then wait for the deer to become momentarily stationary for their ethical shot.
IMO - it would be unethical to shoot at a running deer without being well practiced and have the belief that you will indeed inflict aquick, fatal shot.
We used to roll an old tire with a hubcap from behind my uncles barn and down a small hill towards his pond. When first rolled we could hit it easily. But when it picked up speed - the hits went way down. We were mostly using a .22