Limitation of Ballistics Manipulation is that it's useless without an ammunition supply. Wonder how that'll play out.
That only means that whoever added that limitation doesn't know what ballistics is. The Wkipedia article (linked in the power's page, mind you) describes a ballistic body as "a free-moving body with momentum which can be subject to forces [...]". Not only ammunition, but literally any object fits that definition, which is why I said that Ballistics Manipulation is like a free Telekinesis.