if you hit your first deer behind the shoulder and only 2" high then id say improve your tracking skills along with your heads. maybe you didnt get in as much as you though but 6" is good enough to kill in the lungs area just may take some time to die since youll probably only get one lung. if you really want to blast through deer go with a cut on contact 2 blade head or one with small bleeders. im not sure what the heads you use look like. i have muzzy phantoms for my recurve and they penitrate my target very deep (havent shot a deer with the recurve ,yet working on it) some head like that will help.