When i 1st got my slingshot and i used to use it a lot more then now(it was my varmint weapon for some years) i used to be able to shoot a 25cent coin out of the air. I was real good but i have not picked it up for some years now.
I used to use 38cal steel, rocks(from the train tracks) , 30-50cal blackpowder balls, 44mag SWC bullets, and dollar store mables.
i hunted and killed everthing from mice to once a beaver, all clean kills to. I started with a Marksman Pack-A-Long Model 3040 and then move up to the Laserhawk Adjustable Slingshot 3061. I also have a Trumark Wrist-Braced slingshot WS-1 and FS-1 Folding but marksmans are my hunting rigs. Once you get a gun you kind of forget about slingshots