Your question could be read in one of several ways...
Other's have answered correctly that it's not a good idea to try to fire a .380 through a 9mm.
However, 9mm Short (the title of your thread) is but one name for the what we known as the .380 Auto.
In Europe you will see guns chambered for .380 marked 9mm Corto (Spanish), 9mm Kurz (German), or 9mm Browning Short (England).
It's possible that you have a gun marked 9mm Short or 9mm B Short. If that is the case, then yes, the .380 Auto WILL chamber and fire just fine in a gun so marked.
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