Strange story, but the bullet has no rifling marks.
https://ktla.com/2019/06/14/man-struck-by-stray-bullet-while-riding-dirt-bike-near-barstow/
https://ktla.com/2019/06/14/man-struck-by-stray-bullet-while-riding-dirt-bike-near-barstow/
So Forgive me if this is stupid, I look at that picture and I see a perfectly shaped bullet. I hunt with 308. Anytime I have recovered the bullet from an animal I have harvested it’s always deformed. And that bullet looks like it could almost be loaded and fired again?
FMJ probably with a steel jacket copper clad and near the end of its velocity. If it didn't hit bone it wouldn't deform.