I had a time getting my field points to group, i was using 5" feathers helical fletched. I had to cut an inch off of them and retaper feathers. If there is any difference in them (arrows) it will show in the group size. Feathers were hitting on both sides of arrow channel and scope mount. I have several with wraps and they hit a different spot than ones without it. Weight difference and wobble between insert and point is another problem.