HaHa Ya I know. I was going to start a new thread about them, but in searching found this!
I figured it was a load of hogwash, but wanted to see if anybody on here just swears by them.
I've heard mixed reviews on them. Some say they work pretty well if they're placed out near the end of the barrel. From what I've seen, the best results that I've noticed seemed to involve longer (22"+) barrels as they would tend to whip more than shorter (thus stiffer) barrels.