I think that answer depends on your comfort with your equipment, the overall conditions (wind, alertness, open lanes, etc), and the area you are hunting. I primarily hunt out west here and, unless you have a bull elk screaming down on you, shots under 30 yards are rare, especially if you are bow hunting Coue's whitetail or desert mule deer, where the cover is sparse and its almost all spot/stalk hunting. In most cases out here, 50ish-yads is the average shot distance with 60-70 being a regular occurrence (I know several people who have taken much longer shots than that and not had deer go more than 50 yards). I've been on a couple of these threads in the past several months and been both supported and chastised for my comfort level, but I stand my ground and I'll say it again. I have a 70-yard pin and I regularly practice out to 70 yards, shooting a 4-5" group. I wouldn't hesitate to take a 70 yard shot on a deer if I was standing with both feet on solid ground, the wind conditions were right, and the demeanor of the deer allowed for it. If the conditions weren't right, I wouldn't do it, its that simple. I've tried hard to stalk to under 40 yards of a deer, but even Ponderosa pine forests don't allow that much cover to get that close. Having hunted deer from a tree stand back in Iowa, my comfort level is completely different and 40 yards is my max. I just don't feel solid enough in a tree stand to shoot any farther than that.