It isn't head spacing both ways off the extractor, the breech face is holding it in the direction that really matters. It's not like you are going to end up with too much.
Worst case I see is if the extractor doesn't hold tight enough, you get light strikes.
And yes, 380 will fire just fine in a 9mm. A local guy committed suicide that way after his friends confiscated his ammo. Hell, I've seen .40 fired in a .45. The case isn't pretty and accuracy leaves something to be desired but as long as the extractor grips it..
Worst case I see is if the extractor doesn't hold tight enough, you get light strikes.
And yes, 380 will fire just fine in a 9mm. A local guy committed suicide that way after his friends confiscated his ammo. Hell, I've seen .40 fired in a .45. The case isn't pretty and accuracy leaves something to be desired but as long as the extractor grips it..