I don't know why I bother with this, every time I answer an Atom related question I get accused of hating the company and beingway behind the times. That said you asked a question so I will answer it. Follow the link to my review of the Atom heads. you will have to scroll down a bit to the middle of the page. http://www.broadheadtests.com/NEWHEADS.htmlIn a netshell though MeanV2 pretty much summed it up.