You want the bareshaft to show a little weak because when you add fletch it will stiffen it a tad. From the photo it looks like that target isn't too far away. It would be a good idea to back up and try it at 15, 20, 25, 30 yards, etc., as far as you can go. Discrepancies will show more pronounced as you increase the distance. If you can repeat that shot over and over, you are pretty much good to go. With properly spined arrows, bare shafts will group with fletched out to 60, 80 yards and more if you can shoot that well.