A .22lr will have no problem penetrating 13" or more. There's lots of evidence of this on youtube.
You can get hollow points for .22 .32 and .380 but I prefer a flat nosed hard cast bullet for these smaller callibers for maximum penetration.
*here's a video for you.
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Last edited by Super Sneaky Steve; December 18, 2012 at 09:11 PM.