I was just flipping through a small game hunting book I picked up at the library. Granted, the copyright was in 1989, so a lot of the rifle/cartridge data was a bit outdated. The author almost completely neglected rimfire rifles for small game. He mentioned them a few times, but always said they were too low-powered to do it right. He was advocating the centerfire .22's at least. I don't know about you guys, but I consider even a .223, not to mention some of the others, quite a bit of overkill on cottontails and tree rats. Discuss.