She spent this whole weekend at a weapons training class, getting some serious situational training. She's always been a responsible gun owner, and is already properly trained on weapons handling. But she has doubled-down on her training now.
It is an interesting response to the situation.
I expect she is still not processing a lot of it. Pushing it down. Suppressing it. That's kinda who she is... beautiful and flashy on top, but that's hiding self-doubt and some other issues I don't know much about.
Doubling-down on her situational weapons training is another attempt to cover some internal doubts she may have. Well... that's my internal armchair psychologist's diagnosis, at least.