I would like to know how many people here are effecient with wrist rockets (slingshots)? I have two that I use an practice with about once a week. I have practiced with glass marbles, stainless steel ball bearings, 3/!6" to 3/8", I am good out to about 50 to 75 feet. My best is about 3" where I have put 5 balls in a 3" circle but I keep trying. They are very deadly and very silent, like an arrow just have to be closer.This is just for my information since knives you have to be extremely close and are so messy..