User blog comment:Master Moridin/A (Potentially Unnecessary) Explanation for Inconsistent Ammo Count/@comment-26397825-20151107053015/@comment-26397825-20151107054345

Well then. That suggests that Dust can be used by a small portion at a time, instead of all of the crystal at once. And lends credence to the second theory, that there are bullets made of dust that can be used a little bit at a time.