I was wondering about the spine of my arrows. I don't have a scale so I don't know what poundage I'm actually pulling, I'm halfway backed out so I assume it's about 65#. The Gold Tip chart puts me right in the middle of the 400spine range. My arrows seem to wobble slightly when I shoot but they hit where I aim. I started fletching with four blazers and it seemed to straighten out the wobble.