I ask questions here when I can't find answers elsewhere so I probably generate activity that might bring people here in the future all thanks to those uncommon questions and topics.They mostly come out when you start a stupid thread. Which you should know by now.
You might be the most thin-skinned member of this forum. You start ridiculous threads then get butt hurt when people make fun of you.
At least it's not a make-you-own black powder thread or yet another NAA Mini thread.
To answer your question, the .380 case head is about 0.015" undersized compared to the 9mm, so the brass will be ruined, and the case won't properly seal in the chamber. Since the cartridge is less powerful than the 9mm to begin with, and you're going to lose more than the normal amount pressure both because of the extra free bore and out the back of the chamber because of the poor seal, your biggest risk is going to be sticking a bullet in the barrel, then piling another one down on top of it.
However, if you can find a video on the internet where someone did this and didn't turn into "meat jelly" I'm sure you'll be fine, because everybody knows that the best way to determine if something is safe or not is to first see if someone did it in a video, then ask on an internet forum.
Cuz who needs another 1911 thread? NAA mini's, making black powder, shooting .380 in a 9mm revolver... that's stuff that people are going to see at the top of their internet searches and bring revenue and maybe future members to this forum.
I figure someone who's a mod would get that, but I guess the mods here are like typical northeast people who love to talk out there ass and demean thread creators instead of actually modding the threads and removing junk posts or actually moving threads from the wrong section to the correct ones.
I'm more frustrated with the lack of on topic posts and the lazy moderating than anything else.
Now we'll see how many infractions I get from that statement and see who's really "butthurt"
EDIT: And if any mod or admin has an issue with the topics I create, they can message me and we can discuss that in private instead of derailing topics.