I don't know about the .30-30, but I once read ofan instance where an American hunter killed an African elephant with a .32 Winchester Special in a Win. Model 94. It was either a person who was with T.R. on his African Safari, or occurred at around that same time. I do not know what kind of ammo (bullet type) was used, or how big the elephant was. But I can't seem to recall where I got that information.