They have been killing elk, deer , antelope , bear and so on just fine for us for years. However I do prefer the 180's for elk. You must have bionic coyotes.
That said I shot a yote in a slow trot with a 223 and a factory soft point a few weeks back. He spun as well then run off. We returned to track him (in snow) that afternoon and lost him on private about 1 1/2 mile in. The blood trail was easy to follow and was like paint spray where he was first hit. No blood was in any track so he was hit in the middle. I say I gut shot him. A gut shot yote will go for miles.