Different firing pins/strikers leave different marks. The fit of the striker/pin to the hole in the breech face through which it passes can affect the mark.
The edges of the primer are still nice and rounded. I don't see anything to worry about. BUT I will say that if you take pics of primers to show an audience, take it from 45 degrees, or even a little lower. When you're straight over the top like that, it makes it 2-dimensional, and it's difficult to see what's happening.