The arrow should no longer be fishtailing at 55 yards. The vanes would have stabilized it by then. The real issue here is that we have a person shooting at his first deer at 55 yards with a bow. I think most of us would never shoot at a deer that far away with a bow regardless of how experienced we are. I shoot thousands of arrows every summer from various situations with my Razortec at 68 pounds and I refuse to shoot at any animal beyond 30 yards. Yes, I have taken practice shots at 40, 50 and even 60 yards but I am way too inconsistent at that range. And like somebody else said, the deer can move alot on a 55 yard shot! Not to harp on the issue but really try to keep your shots below 30 yards and you will have much better luck. Not to mention our obligation to the animal to only take shots we are sure about....