My Ronin (9mm 5") shows some light peening on the slide stop notch.  Very slight but it can be felt.
Questions:  Is this common?   Causes?  Is it self limiting?  Leave it alone or address?   Lightly tap raised material back flat or stone and touch up?
I have had one range session with this one but it was purchased used and it may have been there although I don't think so.
I put a 12# Recoil spring in it:  Too much spring causing it to hit the stop too hard on last shot?
It had a few failures to lock on the lighter loads.
I was using the slide stop to release the slide on a new loaded magazine.  I know better now and will pull back the slide and release (slingshot?)  in the future.
Loads ranged from mils Blaser Brass 124 grain to +P 124 grain Gold dots.  All factory loads
Observations / advice please
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