ORIGINAL: virginiashadow
Bruce:
"If it is once every 4-5 shots it could be grip, as stated, or it could be that one arrow. Mark your arrows with some numbers, dots, lines, or something to distinguish each one and then you will know if it is the same arrow evrytime or a different arrow. It it is a different arrow each time then it could be grip. I still think your arrows may be a little weak spined for even 65#. What bow do you shoot? "
What spine would you recommend for me? I shoot a Reflex Excursion 2004. I just played around and put on some heavier broadheads today and shot....and they seemed to group tighter and not have the side to side inconsistency. Maybe it was just a placebo effect, not sure. Refletched a bunch of my arrows tonight and gonna get back at it tomorrow.
I ran your data and apparently I was wrong about it being weak. Anyway, I would say the heavier tip gives you a better FOC and that is helping your groups. If you can keep the heavier tip on there that would probably be a good idea.