Arrows "corkscrew" in flight...help?

[slowbowjoe]

3 fletch,5"  left wing helical, shield cut. I'll check the tiller tomorrow. Hadn't thought of that at all.

[slowbowjoe]

Best I can tell, both upper and lower limbs ate tillered pretty equally @ 19 & 1/2". Silencers are set where they were when I got the bow; wondering if they may be affecting performance also. Shot one of my best groups ever this morning, which was nice - still wanting to see the arrows fly straight, and the bow smooth out a little.