I've just never been able to settle on a 9mm or a .45 for that role, and that's another deal-stopper for me too, now that you mention it... no blowback-operated handguns, at least not in any centerfire caliber.
Blowback actions work fine in .22, .25, .32, 380, and 9mm Mac. It even worked fine in the Astra 600, but 99% of 9mm and up use a locked breech.
The .22 mag is terrible in a short barrel handgun. Huge blast and no more power than a .22LR. I know because a friend and I tested them with his chrono. I guess it is better in a 6 inch barrel.