It's never a problem with the broadheads. It's paying attention to detail--like broadhead alignment with the shaft. And that only works if the shafts are straight in the first place (carbon or alum makes no difference). And micro-tuning the bow/arrow combination. Most often it's all in the tuning. Just depends on how much time you want to spend and how much you want to learn.

Download the Maintenance and Tuning Guide from www.eastonarchery.com. This will help you more than any of us can explain it.