Now before anyone gets too excited, I mean which rounds are proven to penetrate but not over penetrate enough to drop and stop the bad guy. This question is even more pertinent with most parts of the country being slammed by winter weather. Everyone's in winter clothes and there's a possibility that lighter rounds may not be able to get through that thick layer of wool/cotton/polyester bulletproofing.
Thick clothing is one of the main reasons I think there's a differentiator between calibers. I'd like to hear from the ballistics experts here on the topic of penetration through winter or similar heavy clothes.
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