Sure, a bullet can bounce off a bone: https://www.latimes.com/archives/la-xpm-1994-10-25-me-54554-story.html
> “The bullet didn’t enter his skull and the shot to his chest bounced off his breastplate bone,” said Sgt. Charles Evans of the LAPD’s Foothill Division. The man was treated for superficial wounds at a local hospital and released, Evans said.
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