the bow tech at the shop where i take my bow always goes about 6 feet, he says too that you need room for your arrow to recover from the oscillation of the shot. i just read an article in petersons bowhunting magazine (online article) about tuning, they say paper tune at 6 feet, then once you have it tuned, back up another couple of feet and shoot again. when shooting through paper, you can get it tuned perfectly at one distance, but it may only be tuned at that exact distance, so to tune it at two distances. as the arrow rotates in flight you may get a different tear by moving back a little. once you have it good at 6 and about 8 feet, it should be good. i just did that with my bow and it shoots great. ive also heard different things about the distance when paper tuning, but ive been going with the 6 to 8 feet, and it seems to work good for me and my set up.