The slicks are all grouping together. I have tested my arrows and they seem true. Could having straight fletching cause a problem?
I agree with those who suggested helical fletching. IF YOUR BOW IS TUNED, and you still have the problem you experienced, oftentimes the helical fletching will bring the arrows to where you want them. I had the IDENTICAL problem a few years ago using straight 4" fletching. When I switched to 5" helicals, my BH groups jumped right to the same place as my FP.
