9 mm would require a backstop or for you to line up a half dozen or so to prevent "rain on the roof" for the neighbors. 22 mag is a little more frangible but safe shooting practice still applies.
9 mm would require a backstop or for you to line up a half dozen or so to prevent "rain on the roof" for the neighbors. 22 mag is a little more frangible but safe shooting practice still applies.
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