The best thing to do is go to a sporting store and test fire the ones you are looking for. Also give Dave a call at Wyvern Creations and pick his brain for the details of each one. He was invaluable when I was making the choice several years ago. And they had good prices but he did not push to buy from him. Talk to everyone you can that uses a crossbow and read read read alot in order to get enough information t make your buy. Good Luck. I settled with the Parker Enforcer and have never regretted it.