Sorry, but I have to disagree. My dad used to knock off Mule deer with single shots to the lungs - about the same tactic as a bow-hunter uses. Once he even mistakenly killed an elk.
Later on, when I lived in the Alaskan bush, I was out cutting wood when I saw a moose nearby. I stalked him for awhile and finally put a shot into his right eye, knocking him to his knees. I then ran up and put a second shot into his brain.
My dad used an ancient Savage .22 with iron sights and I used a Ruger 10/22 with a scope.
Well, I could kill Shaquille O’Neille with my Crossman .177, but it would have to be a perfect shot and he’d have to lie down and agree to it!
(wouldn’t want him fallin down on me!)
I’m gonna stick with my original statement that a .22 should not be considered a zombie stopper. Look, I understand what you are saying, and commend you and your dad for some fine shooting. A few years ago, I was back east and me and my brother were plinking around with .22’s. After I shot about a half dozen pigeons, he says “Man, you are damn good with that rifle!”
Now I rarely hunt anymore. But my brother is totally dedicated to hunting white tail (upstate NY) with a bow and with a shotgun. So I took it as a pretty good compliment.