ORIGINAL: splint2004
i cant understand why it is shooting low if it is lighter. The 55gr broadhead/arrow combination are meant to be shot together. I may stick with the 100 gr if it is faster then the 55 gr.
There is no doubt that the lighter arrow is moving faster. The problem you are having is not speed but I suspect stability. I think that drastic of a drop in arrow weight is either causing spine issues or FOC (Front Of Center) weight distribution problems THIS is what is causing your arrows to impact lower.
That is why your groups are better when you go back to the 100grn broadheads.