Well to be honest everything mentioned except the shotgun are high powered rifles all with the capability to travel over a mile in the right situation. Like if you pick the wrong type of bullet and/or miss the target. The only difference will be the size of the hole you put in whatever stops the bullet.

I don't know if they make any varmint type bullets for the 270, but if they do I don't see where it would be "bad" choice for coyote. As long as you pick a bullet with rapid expansion and one that will fragment easily on impact.

I honestly don't see where the rifle has anything to do with accidentally shooting live stock or someones property in the background. I say it has more to do with the person pulling the trigger.

That being said it is hard to beat a good .223 center fire. Inexpensive to shoot, pretty good range and usually pretty accurate. If you want something a little faster and flatter step up to the 22-250. And if you want something with a little more versatility get a .243 or 25-06.

They will all injure livestock if they are within range and you miss your intended target or pick a bullet that will zip right through a small animal.

My opinions anyway

Paul