OK. I shoot a Hoyt UltraMag, 73#, 30". I shoot 29" Easton Carbon Excel 340's. I don't know what speed I am shooting, but would like to know. Anyway, I digress.
Just the other day I paper tuned the bow, and it is now shooting absolutely perfect bullet holes, which I am most happy about. Here's the question.

I have a pin set at 20 yards, and when I move back to 30 yards, I use my 20 yard pin. There is virtually NO drop at all.......It hits the same place as when I shoot at 20 yards. Now, I know an arrow doesn't fly flat, even at speeds over 300, so that just doesn't sound right to me....but, I see what I see.....what do you think??

i cant explain it either my friends bow equipped with muzzys he can use the same pin for 15 25 35 40 witout going to the next pin its crazy but also i see what i see

I think that the arrow is still on it's upward trajectory (how ever so slight) at 20 yds and is either leveling or dropping at 30. An ever so slight adjustment may be neccessary to either knock or rest. You don't have to have perfect bullit holes to achieve accuracy. Maybe in a perfect world.