I have known this for a while, but interesting.
https://www.usacarry.com/hollow-points-defensive-ammo-is-necessary-concealed-carry/?utm_campaign=coschedule&utm_source=linkedin_company&utm_medium=USA%20Carry&utm_content=Hollow%20Points%20And%20Defensive%20Ammo%20Is%20Necessary%20For%20Concealed%20Carry