I think Jmac is right. I've shot a Wb for 4 or 5 years now as well. I'm sure you could shoot helical fletch but I imagine it would cause alot of refletching. I know you can shoot offset because I have since I've had it and I've never had to refletch an arrow. Actually still have a few that are as old as the rest and have been shot a ton and killed a few deer...still havn't had to refletch.