Hi Dwight,
I am not the most expert on this matter but I will try to reply to your questions:
1) In Italy the 9x19 para is forbidden for the "civilian" guns, it is only available for the military weapons.
2) All the 9x19 lugers are modified to chamber the 9x21 IMI. As far as I know the barrel is not modified but the chamber yes because of the different lenght of the bullet.
Different situation for the 7,65mm. There are not restriction for this caliber and so the Luger on this caliber are not modified.
Due to the fact that I am not a shooter I cannot say nothing about the different behaviur of the pistol when firing this bullet.
Sorry but I cannot help more.
Lucky the contries that not have this unuseless restriction!!!
Have fun
Mauro
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