I get way too impatient as I made these out of bronze so I can shoot with them. They shoot the best out of any slingshot I own, and I set them up for 1oz lead balls which are 3/4" or 19mm. Usually 12" of theraband gold1 1/2" tapered to 1" and usually two layers. I have played with other set ups and longer bands with more theraband gold are better. They are a constant work I. Progress but like a well used Olympic pistol, it will always be a bit tough and never perfect. Maybe one day I will shot peen the outside for a better textured feel.