Baby Luger Breech Block Slap

[milesc2]

I was inspecting my baby Luger after my first range trip with it and discovered that the breech block may have been slightly touching the inside rear of the frame.

To try to resolve this issue I installed a longer mainspring. I believe it now has the longest possible mainspring installed. (any more and the action would not cycle enough to engage the hold open)

It seems the issue is MUCH better now but after firing about 130 rounds I can see a small amount of breech impact on the left side of the frame. It is very slight, but I don't think these surfaces should be touching at all. I dismantled the pistol several times while shooting and it appears the mark was not getting worse. It was there after the first couple mags and stayed the same as far as I could tell.

I am using regular Winchester white box 9mm Luger 115 grain.
I see no galling, wear or marks on any other part of the pistol.
The gun passes the tape test just fine.

My questions:
Is this normal? Will it cause issues down the road?
If need be what can be done to correct this?