well i just got done shooting my new tekans. i bought 100 grain heads. i shot 15 rounds of three. at thirty yards i was able to group about 2.25" consistently and they already cost me a vane. i am pretty impressed, i am new to this sport i just bought a bow about 2 months ago so i got along ways to go. i also bought a pack of the nap crossfires and the tekans where much more consistant and accurate for me. the tekans did get full of target foam which was sorta a hassel and also i had to replace two o-rings all together which i guess is not to bad since the other designs i saw at the store looked like the o-rings where 1 time only. anyways im going to west texas this weekend for a deer hunt and i am hopefully going to get the opportunity to try out the tekan on some real flesh!!!!! i will let you know how they perform. oh and both heads still had a pretty decent edge left on them after shooting and right from the box they where both able to shave hair.