I have a folding wrist rocket type slingshot, but was never really impressed with accuracy/power ratio. I have killed a few pesky chipmunks that were eating in to the house foundation through the years, but few. A few years ago, I made a biblical style sling and found it to be a lot more "real" for power, albeit also hard to control. I am at the point with a lot of practice that I can hit a Milk jug with a rock about the size of a extra-large egg. I'm working on a mold where I am going to try making clay (something we have tons of) eggs and fire them to see how they work for consistency. If you haven't tried one, you should it's a gas, just be careful.
Finally, I'm also in to blow guns and thought I'd share a pointer on making hunting darts. I use a propane tank and Tide detergent bottles. Wash the bottle out really good with water until it quits foaming. Heat a small area in circular fashion on the side of the Tide bottle until it starts to sag a bit, then push a plumb-bob (the metal smooth ones work best) into the softened spot and hold for a second. Repeat until the whole tide bottle is covered in little dented in holes. Then using a strong set of shears (I use meat shears) I cut the bottle in two and then cut around each cone roughly. Once I have them all loose, I sit comfortably and trim around each cone base until they are sized to just go into the tube of the blowgun with pressure. For plinking/target ammo, I put a daub (about 3/16" - 1/4" dia. ball) of clear silicone into each cone and then push a C-4 nail with flat head into the point of the cone and through. Line these up on a piece of hardware screen with the nails haning through the grid and it'll dry the nails in place fairly straight. If you want to use them for hunting, you can wack the tip on an anvil with a hammer a bit and grind into improvised broadheads. I have made some using bicycle spikes for heavy duty darts. I cut spokes off at 6" length and silicone into the cones the same way. I have made some zigzags below the point and then put a broadhead also, to use for birds, then they hook into them and hinder their flying away.
