"It becomes unethical if you are wounding running deer. "
Oh come on. Ends justify the means?? If we do what we always do, and don't wound a deer, it's ethical? But if we do what we always do, and wound a running deer, it's unethical?? Not buying that. That's no different than saying if you take head shots and kill 100% of the time, it's ethical. But if you take a head shot, and blow the jaw off, it's unethical. For the record, if I have a standing deer 20 yards away, I shoot at the vitals. But at the same time, I'm not opposed to a head shot either