Right off the bat, I'd be concerned with the different points of impact of those different types of rounds from her fixed-sight gun. Say she misses with a 158-grainer and it goes into something it ought not . . . she hasn't been practicing with these rounds and they have grossly different velocities/points of impact: my lawyer nose smells negligence in the water.
What's wrong with the Speer Gold Dot 135-grain +P rounds that seem to be state-of-the-art with police these days? They're pretty easy to find and she'll be able to practice with them. And they're the rounds that are issued by a lot of police departments who still authorize wheelguns.