Winchester Model 67, single shot, bolt action that my father bought used in the late 1930's with his paper route money. Still got it. Took a lot of 'chucks with it. As long as it's 50 yards or less and you can get a good head shot. Learned a lot about stealthy game stalking that way. Eventually I got into centerfire varmint rifles. But I still enjoy using a rimfire once in a while just for the challenge of gettin' in close.