I should have been more clear, but I do appreciate all the info. given.
Apart from what I said about my LB, I shootGT 3555's LW, and RW very well out of this LB. My question is now that I have tried GT 1535's with a straight feather, field tip and broad head shot very well, but is there any advantage to shooting a straight feather, aside from more speed ?
To try and clarify, I can see that the 1535 with a straight feathers shoots much faster than the GT3555's, which have RW on some and and LW on others.