What does caliber 380 mean?

Answer 1

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Caliber is a measurement for the bullet (projectile) in thousandths of an inch, or mm.(metric). 380 thousandths or.380. For a 2 digit # add a 0. Example 44=.440 & 22=.220. 7, 8, 9, 10, 5.5, 7.62, those are metric. Both liked the 380 it was also called the 9mm kurz? or 9mm short since it is very close to a 9mm but has a shorter casing.