country, it could a many different things.....Could be YOU, could be TUNING, could be ARROW SPINE Etc, Etc, Etc...If your set up is correctly tuned, arrows are spined corrrectly (the right size) then it is you and you just need to keep practicing and make sure your form is correct and you do the same thing everytime your groups should tighten, also you need to be aiming at a very small spot. I believe in shooting at a small dot about the size of a dime, I use some cheap little flourescent stickers from wally world that are a tad bigger than a dime....