ORIGINAL: BGfisher
It probably has to do with a slightly different anchor point at the longer distances. Not noticeable to you, but it does happen. As drockw says, the laws of physics show that arrows will drop exponentially more as the distance increases if everything stays the same at the shooters end. You might try tweaking your draw length just a bit. I'll bet you're just little on the long side.
Exactly what i was thinking. It really CANT be the bow/arrow.
Question for you Whitehorn- Do you see your sight housing in your peep and align it consistently every time, no matterthe yardage. If not, then you will definately see varience in your shooting b/c you would be centering your pins, not the housing, and like BG said, changing your anchor.
Derek