I read this post and can't help but shake my head. I'd say its been six months since i've been on this sight and still the same arguments. The fact is that the 17 HMR can kill a coyote and a 22 mag will kill one just as well. In fact I'd wager that they've probably killed just as many if not more than the 22 CFs.
But the fact also remains that just because you can do something doesn't mean tha you ought to try. I've hunted yotes with a 17 hmr the past three years. The one thing I've found is that body shots generally don't have much effect on them.
This past fall I had to trade off the 17hmr. I had surgery on my right shoulder and my 270 was too much rifle for it. So I traded it off for a 243 win. Head shots had the same result but the body shots with this cartridge had much more deadly effects than the rimfire cartridges.
I would say go for a small center fire such as the 223 or 204 the 22-250 is also a very good cartridge.