Back in the Jurassic period, .32s, .380s, and 9mms were considered marginal for defense. Then, innovative ammunition companies designed hollow point bullets for them. At that point, the general consensus was that expanding ammunition (that worked) made the cartridges viable. Then, the misguided, misquoted, and misunderstood "FBI statistics" came out-and set defense ammunition useage back 30 years.
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