What type of fletch is on your arrow , I like 3-5" feathers on an offset or 4-4inch feathers on an offset to stear fixed broadheads . The precieved standard of 3-4" vanes on an offset , just does not have enough stearing effect for fixed heads IMO . You can waste some serious time trying to tune your setup and arrows , but if you dont have enough stearing in the rear of the arrow to counteract the stearing in the front[broadhead] , it like pounding your head against the wall , when the answer is simple .