3 under/ split finger spine

[jeffg]

I have been trying to set my fatal styk up for 3 under instead of split finger. The arrows that I have been using 2115 28" 145 up front fly great with split finger. With 3 under the fly left I am Left handed. Is this normal to need a stiffer arrows for 3 under?

[Orion]

Nope. The orientation/placement of the arrow at the rear anchor point may have changed with three under.  Maybe you're getting a cleaner release, which would transmit more of the bow's energy to the arrow, causing the arrow to act more weak and thus go left.

[A.S.]

I find the same thing. I shoot 3 under. If I shoot split finger, my arrows fly very stiff.