The Ruger 10/22 Magnum was about the only .22 WMR semi-auto that was worth a crap, but it was relatively expensive to make and was a low interest item, so they stopped making them. It was a cool little gun, but just never sold that well. I still have a Marlin 25M bolt gun in .22 Magnum that I've killed a lot of things with, and on anything up to a small coyote, .22 WMR is hot death.
Out of a 22 inch long rifle barrel, mind you.
Reading this article, I am not see material difference between .22 magnum out of a J frame vs a 22 inch barrel?
https://www.americanrifleman.org/art...-self-defense/
Likes pretty much everything in every caliber.
I didn't bother to read the article but that's not possible. http://ballisticsbytheinch.com/22mag.html
CZ and Savage both have a .22 magnum semi auto rifle using a delayed blowback.
I'll wager you a PF dollar™ 😎
The lunatics are running the asylum