Spike, the .380 case is 17 mm and of course the Makarov case is 18 mm.
I'm not sure the Mak will fire the .380.
But I've got .380 brass, so I'll prime some and see what happens.

I don't know the measurements of the Kurz round.
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OK, one final post on this subject of 9x19 in the Makarov.
This may be of some interest to those that reload Makarov ammo.
The selection of Makarov bullets for reloading is slim and the brand name 95 grain JHP bullets run about $12 a box.
Bulk .380 JHP bullets run $7/100 or less at the gun shows.
So my last test is to see if the cheaper.380 JHP or JRN bullets were worth fooling with for range ammo.
I loaded 8 rounds of 9x18 using 9x19 Lee dies.
The load was fired Makarov Star line brass and 95 grain .380 JHP bullets.
The powder load was what is normally a fairly hot normal Makarov load.
The results were better than I expected.
The load felt good and functioned good. A little on the light side but good for range ammo.
At 10 yards the accuracy was better than this target shows because it was windy and I was shooting just fair. Still under 3 inches.
So in a pinch or for some cheaper reloaded practice ammo the .380 bullet looks good (so far).