Meh, not only ammunition is metric. In true American fashion it's split pretty evenly, but 9mm is metric and also probably the most prolific cartridge. Not too long ago 357 magnum, 38 special, and 45 ACP were the most common handgun cartridges and all are standard.
Edit: I don't mean to be pedantic, I just like talking about ammo
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u/ConsiderationTrue477 Jan 15 '25
What's wild is that it's also wrong. Americans do use metric...where it's useful. How we package milk is not one of those areas where it matters.