Hello Gerben,
they mainly used ammunition made by Raufoss. They came in 16 round boxes and bulk packed in cardboard cases with carry strap, wonder where they got that idea

I went up to my attic to snap a few pictures for you. As you can see, they had fun changing the labels over the years. What's on the picture is just a part of all the post war military 9mm I have.
Since it has not been an area of interest for me, I don't have the overview of all the various labels, head stamps, ballistic data and such for this ammunition. I
could go ahead and do some research on this, but before I go ahead with it.. is it really of any interest? Don't get me wrong, I happy to help out, just need to know someone needs the info before I put effort into it
It's not what you are asking for, but since I had the camera in my hands, I added the two white boxes to the right. These are way to hot for the Luger, hence the warning label on one of them. Today Norway use "environmentally friendly" non-lead ammunition in our military. Great ammunition to make a Glock barrel smooth as a shotgun after 2000 rounds and to keep the soldier in bed for a few days with headache from the smoke..
I have no idea how much German ww2 9mm that where used.. they probably used quite a lot of it. But it is a fact that there where captured 9mm ammunition still available at the time Raufoss delivered to the military. So perhaps they were not happy with the wear from the German 9mm (and the corrosive downside of the British rounds, also available at the time)? Just a thought..
All the best to all of y`all,
Steinar