Ballistics type: In your opinion, has this bullet been fired?

[JBDivmstr]

@ducati

Unquestionably fired.

Water? Maybe, but my phone books in the basement are full of these. Complete with little specks of paper sometimes.

I’ve seen them come out of a person like this. Bullet deformation depends on speed, and what it hits. They don’t always act like you think they will.

(bolding mine)

Agreed.
For that matter, depending on the velocity, some bullets tend to disintegrate or at the least, break up into fragments when fired into water.