I don't blame dogs, I blame the owners. Pits have a bad rep. My least favorite dog is the Collie, but only cause they love to chase cyclists more than any other breed. :laugh:
I really like Clays. It saves money, is accurate, relatively clean, and recoil isn't bad. As Fishers said, any specs for a jacketed 230g bullet should work well.
Good idea about the safety, but I took it a step further. I actually trained myself to shoot with my thumb resting on the safety. Evidently a lot of pro's do it as well. Not sure why they do it, but I do it so that I don't have to think or train to take the safety off. When I'm up and ready...