Board Thread:Speculation House/@comment-58.161.102.224-20130820083031/@comment-210.50.61.177-20130918121752

Rudy has a valid point, as there's no messy holes after being hit by said bullets. The person that started this also has a very plausible theory.

I think that the bullet itself is actually compressed Dust Powder with an ignition/detonation source, with the casing preventing tampering and acting as a mold - pick up the rounds afterwards and reuse them.

But hey, technically no-one's wrong.