I don' t have a problem getting my 27.5" Thunderhead tipped Beman' s to fly like darts @285 fps.
And that very well could have been one of my problems with them. I was using 3-d select 400, uncut. I believe that they were 32.5 inches long. I have heard of others with long draws with the same problems that I had, but only know that they didn' t work for me.
Untuned bow, nahh, definetely not the problem.