I think lower you knocking point and you will be ok,,
I dont normally bear shaft,, but I had a shaft with no feathers the other day,,
so I shot it just for fun,, shot pretty good,, but the knock was hitting high
I lowered the nocking point on the string and the arrow flew and hit great,,
like I said I normally just shoot what ever arrow flies the best out of my bow,, if I am making dog wood shafts, I will shoot them bare, just to get them in the ball park,,