You loaded a 380 case by mistake? Or am I misinterpreting lol. That's one of my biggest concerns when loading 9mm as I've came across a couple 380 cases mixed in my bag of cleaned/tumbled 9mm brass. Fortunately I noticed it before dumping powder and seating the bullet.
Depending on the press you have the .380s wont fit in the 9mm shellholder. Usually my dillon would fling them out of the press on the priming stroke.
-Mike