I think many of us trad gangers estimate range in terms of short, medium, and long without tying it to a specific number. Accordingly, the short is a natural feel good distance as long as the angle is good and a clear view is available. The medium begins to feel less comfortable and causes us to carefully consider. Long begins to become doubtful causing many to hesitate to drop the string at all. Specific distances will no doubt vary from hunter to hunter. For example, I know many guys who are o.k. with a clear shot at 30 yards, but for me that is too extreme. Remeber, if it is a tough shot on the 3D course, it will be even tougher on live game. I guess the most important thing is that we honestly assess whether or not we can pick and hit the hit "the spot" at whatever distance the situation arises. Or as Dirty Harry said, "A man has got to know his limitations."