I took the plunge and bought some carbon arrows last year. They are made by a company out of CA now called Oust Composites, they used to be CAE. The arrows are 55-70 splined, and I shoot them at about 28.5" with 4" Flex Fletch vanes and 100 Gr. tips. I tried to get broadheads to shoot on them after tuning my bow to shoot the arrows with target tips, and they were shooting 12" right and a little low. I tried Thunderheads and 3 and 4 blade Muzzy's all with the same results. What I would like to know is if I'm shooting too light of a broadhead? The 100 Gr. work fine on my 2413 aluminum arrows. I heard recently that a heavier broadhead is better because after midpoint of arrow travell it "pulls" the arrow along. This sounds plausible to me, does that mean that with the 100 Gr. broadhead that the arrow is steering the tip and causing the extreme difference between the target tips and broadhead? The results werre the same out of my '99 PSE Carrera and my '02 Patriot SC.

What poundage is your bow at?

Both bows are set at 70 #.

I'm thinking you are underspined being at the top end of the arrow rating.jmho.Maybe try backing off the poundage and see if it gets better.