Say "fuck" five times? R-rating
Show children being stabbed, shot with arrows, being eaten by dog mutants, having their necks snapped and their throats slit? Eh, PG-13.
Most of that was offscreeen and I felt they should've pushed the violence further. By the end of the book, Peeta and Katniss were pretty fucked up, but in the movie they were fine.
Oh and this is crap that Bully won't get a PG-13 rating but I don't see what the big deal is to get kids into an R rated film. The Passion of the Christ was R and I know there was a bunch of kids going to see that. (I went to a Christian school). Hell, I saw the remake of Friday the 13th in theaters and there was at least 3 kids under the age of 10 at the showing I was at.