I really like ST's and have been using them for a few years now but I am experiencing something strange. They are flying nice and straight with no left or right drift but are exactly one pin high at all ranges. My 100gr Stingers and Strikers are dead on with my field points. I have never experienced this before. I have put them on a scale and they are 100gr. Anyone have any suggestions? I really want to put my ST back on.