Squirrel hunting with a slingshot? Lordy, I was raised on that. Way before my dad would let me carry a single shot .22, I got off the school bus, grabbed my slingshot and a pocket full of marbles and "steelies" (if you remember those), and hit the woods. I locked a lot of the critters off the hickory limbs, but never killed one. My slingshots then were made from a dogwood fork and inner tube rubber from a bicycle. That would take a rabbit, but not a squirrel.
Now there's all kinds on the market. Recently bought one from - can't remember the name - Chief something or other - and it shoots hard with tubular rubber, but haven't taken it hunting. He makes one with a 40lb. draw with an arrow adapter.
This year, since I can no longer pull a traditional bow, I'm going to try for squirrels with my crossbow with some of those hard rubber blunts. That ought to have more energy than a slingshot, you reckon?
Speaking of squirrels, no greater woods fun than squirrel hunting. Plenty of action and no big carcass to drag out and process. Skin him, soak him overnight in saltwater, boil him a long time, then roll in flower and fry.
If you're lucky enough to live in the eastern woodlands, you have a chance at fox squirrels, which are about twice the size of a gray. Lots of meat on one a fox squirrel.