IMHO the worst expandables I have tried. Poor Penatration comepared to the other heads I have shot out of the same bow. They take MORE KE than most anyother brand of expandables.I shot 3 deer with them not one was a pass through switched to grim reapers the next year shot my limit 3 deer all pass throughs. Then I have changed bows so it is unfair to compare them with the rocket sidewinder 4 I shot last year and will be using them again this year.