Knew a guy once who was arrested overseas for growing a couple of hemp plants (he wasn’t very bright). They confiscated his BB gun and a tube of BBs (noisy stray cat plinking is what got the police involved in the first place). The police report, which appeared in the paper, counted the two hundred odd BBs and reported it as “a rifle with (about) two hundred rounds of ammunition found in the apartment”.
You gotta laugh, sometimes.
Well, you have to admit that BB's are "round" ammunition ;-)