Would it work I am not sure, Would I try it no way. The sizes are to far off.
I reload both those calibers and have die sets for both.
I no that the 380 Cal will not fit in the 9MM die's.
I have grabed a 380 case when reloading 9mm buy mistake and it crushed the case. Now I keep the 2 very separated and sealed and labled.
The 380 and the 9x18 are differant sizes. You said 380 in one spot and 9x18 in another.
Tony Z