Smokepole: I haven't tried them either, but from what I've read, they tear up real fast and cost you 15 fps. Here's why I won't even try them: I have strings that slowed me down 15 fps. and there was a very noticeable change in my point of impact at even 20 yds, much greater at 30. Assuming as they disintegrate your fps goes back up, your once spot-on group is gonna be shifting as they wear out. Just my thoughts.