about the amount of deer we shot i started really thinking about it and between the 7 family memebers shooting these heads (my dad uses spitfires,they open over the top too) we each shoot at least 3 deer a year and most of thee time at least three of us shoot 5-7 deer a year depending on how much hunting we get to do in NJ. so 7x3=21deer a year at least x 10years (i know at least ten years weve been using them maybe more) thats 210deer but i didnt want to sound ridiculus and i cant be sure that number so over 100 is a def number. also i think i have a right to passon what ive seen with these heads ive read lots of post on them cause i was interested too when i heard there were "so much better" then anything else. but the post ive read and there has been alot id say 50% love them 50%hate them and at least 75% have had some problem with the heads. the other reason i like to letpeople know what ive found is that they cost so much and all they hear about them is the advertisement claims and all the guys on tvusing them.no doubt theyll kill deer but thats not saying much (a field tip in the lungs would kill a deer) the holes are not impressive when you consider other brands have had the same and bigger holes for years.