Slingshot Shooting

I'm going on eighty and have had a passion for slingshots all my life. When I was a kid, I was rarely without my trusty slingshot. Whether I was sent out to bring the cows home for evening milking or going over to the neighbors for a dozen eggs, I always had my beloved slingshot with me. I couldn't walk in the woods without scanning the trees looking for a suitable fork to make yet another slingshot (I find myself still doing that). I couldn't walk down a road without constantly scanning for round stones suitable for ammunition (all the local roads were gravel at that time). I love the shooting sports. I have several rifles, shotguns, and pistols but rarely do I ever shoot any of them. My slingshots are another story; I now practice target shooting, with my slingshots, at every opportunity. During the middle part of my life I went many years without shooting a slingshot because of other interest (pocket billiards) and obligations (makeing a living). Looking back, I regret not making room in my life for slingshot shooting during that period. By profession I was a Hydrologist. I spent my entire career working for the U.S. Geological Survey. During that time I authored twenty-five Professional Papers. After retiring, I wrote three very successful books on pocket billiards.