light and weather, no wearying stalking, no risk of movement, no depression, poor food, dysentery, etc, all you have to do is hit 9 out of 10, take home $5000. You are so SURE slingshot's worth a crap, come ON, PROVE it. 3/16" ID hole in washer, your rock AINT going thru it,ya know. Tape em on a pc of cardboard, have at it. u r JUST as fos about your slingshot as you are about "needing" .5" groups with .22 rifle, at 50m.