Even if she's not as bullet proof as Superman she'd still be pretty bullet proof compared to low grade guns and rifles.

Smart thugs may avoid being taken down by the Batman, but it's the stupid thugs that are persistent enough to keep shooting for the sake of eventually seeing some wonder nipples.

NegativeSoul said:

Even if she's not as bullet proof as Superman she'd still be pretty bullet proof compared to low grade guns and rifles.

I'm sure there was ancient comic that explains how she "deflects" bullets due to her powerful boobs.

T34-38 said:

I'm sure there was ancient comic that explains how she "deflects" bullets due to her powerful boobs.

She's mostly invulnerable, but she's blocking bullets because if left alone people will just fire at her boobs to make it jiggle.