How well you can bare shaft tune will depend on your shooting form. If you are really good, you can shoot them as far as 60 yards and really see what's happening. I've seen guys try bare shafting that thought they had the correct spine. Some spines were so far off they would slap a target sideways at 10 yards. I will shoot 20-30 shots though before cutting because everything has to be perfect with release and form or it will really show.
One caution. Don't try bare shafting broadheads at long distances. Some designs can catch wind and do exciting things. I've tuned my target bow so that you couldn't tell the difference between feathered and bares shafts at 60 yards. You have to be really on your game though. I was shooting over 100 arrows every day back then while competing. It would take me a while to get back to that level..
