I've been shooting a good bit lately, trying to get my new bow tuned in for this season. At 20 yards I could not be happier with my groups but when I step back to 30yds the pattern is no where near acceptable to hunt with for me. I recently adjusted the 30 yard sight as it was a new bow and the bow shop only set up the 20 yard pin. I am fairly confident that I have the pin set in the correct location and secured with the Allen screw on the sight mount. I am not one to throw blame on faulty equipment often as its usually the operator but I will tell you the fletching on the majority of my arrows has seen better days. Could this be part of the issue? Could the extra 10 yards of flight be enough for the bad fletching to play enough of a part causing the groups to scatter? Is there something else I need to pay attention to ? All of my yardage is checked with a range finder so I know I'm good there.