I never said it was new technology. It should penetrate well being 158 grain. And being non jacketed and soft lead hollow point SWC , it should expand. Even if it doesn't expand , it is a SWC and the frontal area should make a nice wound channel. I believe it came in +P as well. Police used round balls before round nose too. Wild Bill Hickok did quite well with a .36 Navy Colt which is about as powerful as a .380.
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