What the heck do you want to jerk back 70 # for? Hunting something really thick skinned perhaps? If you're not a regular 70 # shooter, your 10 rings are likely to suffer. Not to mention those long, cold day sits on stand when the moment of truth arrives. I've not seen any whitetail yet that can't be passed through with 60 # of draw weight with a properly tuned arrow. Nope... not unless your bent on impressing the newbies, or maybe shooting Rhino's...