If your arrow rest,nocking point and broad head alignment are all tuned right you will never have a flyers and in most cases you shouldn't have to move your pins much from field points to broad heads. I shoot 4" strait fletchings and muzzy 100 gr. 3 blade broad heads with no problem. If you are not sure how to tune your arrow rest and nocking point take it to your local pro shop trust me it will be worth the 5 or 6 dollars to have this done. I definetly agree with every one this is not broad heads fault.