I guess my pet peeve of "firing an arrow" is also a gun mistake of sorts. It can be found in many fantasy books. A bow is not a gun, there's no gunpowder involved. If a commander orders his archers to "fire" what should they do, set their bows on fire?
What's the correct term? Loose? I'm sure I've heard that before. I know nothing about arrows except to identify the pointy end.
"Loose" is kind of for a volley of arrows, not aimed, just pointing in the general direction of the attacking horde. Otherwise, you shoot them, not fire them. In English.