Hey guys,
Yesterday I took my bow to my tech guy to finally get it all set-up and tuned. I dropped it off so he could put the new string on and all the accessories. Well, this morning he called me and told me to come down so we could fine tune it to me. Well, when I got there, he told me that he had spent around 5 hours last night trying to get my arrows (31" BlackHawk Vapor55/70' s) to shoot good but he just couldnt. Well, I went in and shot them through paper and I was getting about a 1" high/right tear. He then told me to try one of his arrows (20" PSE Carbon Force 300) and it tore about 1/4-1/2" high holes. Then we headed out to group tune and I tried one of my arrows again and saw some very erratic flight, the back end was wobbling in very loose circles, maybe 9" in diameter. I then shot his arrow and it was dead perfect. Also, his arrows were getting roughly 4" more of penetration than mine. Probablly due to the wobbling in my arrow. Well, he let me borrow 3 of his arrows and said to shoot them for awhile and figure out what I wanted to do with my arrows.
Now, do you guys think that this problem could have been caused by a underspined arrow. Would it throw the flight off that bad? The arrows are rated at 70# and I bumped my draw weight down to 65# today because to be honest, I really didn' t need to be pulling the 72# I was. I would think that a arrow rated at 70# would be good spine out of a 65# bow.
I have two choices here, I could just keep my arrows and get new ones. Which costs extra $$$$
I could also cut 2" off my BlackHawks, which would make them 29" arrows rated at 70# spine, as that would increase the spine more. I am just not sure if the problem is the spine or not.
One more thing, we checked for fletching contact and there was absolutely none.
P.S. With his arrows, I was grouping 2-1/2" at 30 yards.

With mine, maybe 6" groups at 30 yards [:' (]