So they are tough little beggars, then?
IMO: There will only be two survivors after WWIII is fought with all out nuclear weapons.
One will be cockroaches.
The other will be Coyotes!
Yes, they don't kill easily with anything less then a high velocity varmint bullet.
Or, a brain or spine shot, or massive damage from a shotgun.
I have killed them with one shot from a .22 at 100 yards. (Lucky spine hit.)
And I have had them run off to die somewhere else after blowing one front leg clear off with a 30-06 HP bullet. (Perfect shoulder shot that blew a front leg pin wheeling into the air.)
The only two calibers I have used in 50 years that gives Bang-Flop no twitch kills are the 22-250, and the 220 Swift.
They kill them DRT, just about every time.
I haven't had as good a 100% DRT ratio with .243, .270, 30-06, 30-30, or 25-06 rifle calibers.
Or any handgun caliber.
Handguns?
You can usually expect a long run out before they realize they were dead 200 yards back and didn't know it yet.
So you often can't find them in thick cover.
PS: I shot one off the back porch of our old farmhouse one winter with a .222 Rem at about 200 yards.
Knocked him down, and he got up running.
Knocked him down two more times running at 250 -300 yards until I ran the Rem 722 dry, and he kept getting back up and running.
I tracked him until the blood trail ran out and never did find him.
I found his bones in our hay field about a 1/4 mile further the next spring while mowing hay!!
Most ribs were broken, and one shoulder joint destroyed.
rc