I just shot the test kit B 50-70lbs, (3rivers) and all the arrows shot perfect, no wobbles or wiggles and all shot to the same spot. this is a new to me 60lb fireball, I was going to order some new shafts maybe some tapered ones, but this certainly didn't clear things up, any ideers?
I'm not familiar with the Fireball. recurve? centershot? It does point out the fact that wood is the MOST forgiving of all the shaft materials. Do you have a spine testor? You may want to re-measure the spine on the test kit to be sure you have the three different spines.
Generally with wood though, 5-10# of spine heavier than draw weight will be good.
Jeff, shoot them thru paper from 6-10 feet and I think you will see some difference. 5" fletch can stabilize an arrow before your eye has a chance to pick it up in flight. Paper tuning will tell you what is actually going on. I know it sure helps me a lot. I think the Fireball is cut to center and probably fairly forgiving of spine.
30+ yard shots make it easier to see. Might want to get another guy with experience to stand behind you and watch. I concentrate so hard on the "spot" it's hard to pick up the wobble before the fletching corrects it.