Nothing wrong with ThunderHeads. They didn't group well out of my 1st 2 bows so I went to Magnus stingers which flew well. I upgraded to a Hoyt CST and it shot everything well so I bought a pack of QAD Exodus because of all the hype. These are the 1st broadheads I have ever tried that actually matched my field tips to 60yds, both trajectory and accuracy! I'm going after bull elk and muley buck this year with Exodus swept blade heads. Pictures to follow....