Yeah, but there you are only considering the limited subset of the population that actually owns a gun and buys rounds for it. Although the author of the post i

Yeah, but there you are only considering the limited subset of the population that actually owns a gun and buys rounds for it. Although the author of the post is American and I am not, which makes the likelihood of him knowing the difference bigger, I am pretty sure most of the people I know have no idea what the difference is between a bullet and a cartridge (fortunately there is Wikipedia).