I wouldn't start with a .22. That's a little bit weak. At least try a .38 or a 9mm first, preferably a reliable, comfortable gun. For home protection, however, I would personally recommend a 12 gauge, but that's just me. If you are at the point where you are desperate enough to aim a loaded weapon at someone with possible intention to shoot, you want to GET THE JOB DONE right the first time (shot).
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