I've been experiencing the same problem with my 1938 s/42. can someone show a picture of what need to by modified to correct the issue?

brass
 

This is what is happening to the ejected brass

It is hitting the side of the receiver as it is ejected, probably the left side.
Sometimes you can make it eject straight up and out, by carefully filing the front edge of the ejector to make it parallel to the bolt face.

That "ding" is not bad, I've seen much, very much worse dents!

Boy, me too!! Those dents should be no problem to a handloader, as the sizing die will correct it.

LH ding!
 

Hi to all, while I totally agree that the ding on the brass can be easily corrected by sizing, it doesn't address a more sinister problem lurking in such Lugers? If only once or twice in a thousand, it causes a smokestack or stovepipe jam, it is too many potential malfunctions for me!!!!
The drums I test at the range, require a super correct and healthy shooter Luger so I'm not testing two things at once... been there, done that! You can tell how healthy the set up is on your luger by how high the brass goes vertical on ejection... I vote for cleaning up the ejector, and new extractor springs often...:eek:.... just me, ….best to all, til...lat'r….GT...:cheers: