This seems so simple it's not even much of a gunsmithing task... but I've read enough mentions that is should be - like "if you are converting to 380 you are going to have to open the boltface up" or "you will need to find a magazine for 380"... So I had to try and it appears to be plug and play:
1910 in .32 and a 1922 barrel in 380
The mag is 32 and it fits like this
And 380 fits just a bit more fush
Disassemble
To remove the barrel
Barrels side by side looking in the chamber
And put back together
Everything fits, feeds and ejects as it's supposed to. No modifications required to anything _at all_.
Hope someone finds this useful.