Haven't had a problem w/ them not opening but did have the problem with one of them not staying closed lubed the O-ring & it is fine only used them on a target so far man it does make one heck of a hole well I will see what happens hopefuly in a in a month from now I was using the trohy ridge expandables like I said & a couple of them flew like garbage & the rubber bands would come off sometimes when I pulled them from the quiver so that is why I tried the rage will see may go back to fixed blades at some point but the Rage really look like they will put a hurt on