If the shuttle t's were off the mark, check your shafts.. I've had about 5 friends switch to them and they all shot the same as field points.. I did have some drift on me last year when I was shooting Those PSE arrows,, .oo3 sraightness they claim..I had two dozen, only had about ten I could use with broadheads..Sold em on ebay as soon as I could..Went back to easton's..