User blog comment:Master Moridin/A (Potentially Unnecessary) Explanation for Inconsistent Ammo Count/@comment-26397825-20151107053015/@comment-26397825-20151107055339

There could be both types of ammo, and certain weapons just aren't capable of using the dust bullets? Like, a high caliber sniper rifle wouldn't because it need the physical power of the real bullet rather than the elemental power of a dust bullet, but something like Ren's weapons would because they are based more on a quick burst of bullets and spray of effect rather than pure physical power.