[alvin]

According to what I heard, firing .380 ACP from 9m/m Luger pistol is OK, as long as the cartridge was feed from the magazine and hold by the extractor, it shoots but the action does not recycle completely because the ammo is weak. Manually pushing in .380ACP into chamber won't work because the case goes in too much.

This type of unusual activity also happened in real world operation....in "gun hungery" part of the world. In 1980s, Northwestern China, there was an fugitive armed with a Walther PPK, which was a super rare gun there, and he could not find appropriate 7,65m/m ammo, so he loaded the gun with "Type 64" pistol's cartridge (common there, rare here) which headspace is a little bit shorter than .32ACP. The gun usually worked and he had killed a few men with that. The day police captured him was interesting: he almost pushed the PPK barrel on the first police's forehead, who just rushed into the room and obviously astonished. The fugitive pushed the trigger.... no "bang".... the police "waked up", used his service pistol as a hammer and knocked the fugitive's head and captured him. Later inspection of the PPK and the chambered round showed a shallow dent on the primer. Not many people were so luck though.