In my humble opinion a .22 is not necessary if you go .38 ( revolver) or 9mm (auto). You can usually find good deals on target ammo and practice well enough at defense range distances with minimal blast and recoil. Then you don't have to upgrade to a larger caliber gun for defense since .38 and 9mm are up to the task when you switch to more premium defense rounds. I cut my teeth on handgun shooting using a 6" gp100 shooting .38 target loads. For home defense a medium frame size service weapon is superior. For carry you will have to go smaller and compact but also practice even harder.
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