i changed from the ironhead to the montec a couple of years ago. the montec is one tough head. the only problem i have ever had with them is the head not being sharp out of the pack.....you need to sharpen them before you hunt with them....they fly great, and are almost bulletproof. i have harvested several deer with the same broadhead and arrow, just spin check them, if the spin good, clean, sharpen, reinstall, and hunt again....much more durable than a replaceable blade head.