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Sorry, if this sounds stupid. I have shot many pistols through my life and I recently became a first time HK owner. After shooting 200rds through my USP I noticed all brass marks near the ejection port. I have never seen this happen with any other pistol I have shot. Is this normal?
 

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That is really the ONLY pistol you’ve noticed this? It’s not all that uncommon. Some guns slides are more prone to it vs others depending on the contours.

I wasn’t calling bull**** or anything. I was just surprised you had never seen it before on any other gun.

mostly shot glocks, sigs and berettas, and i havent seen this happen to any of those pistols.
 

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Sorry, if this sounds stupid. I have shot many pistols through my life and I recently became a first time HK owner. After shooting 200rds through my USP I noticed all copper marks near the ejection port. I have never seen this happen with any other pistol I have shot. Is this normal?
Copper ? Seriously ? Are you shooting some old Russian ammo or something ? It's from whatever metal your cases are made from. When the RSA settles in it will probably go away .
 

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Sorry, if this sounds stupid. I have shot many pistols through my life and I recently became a first time HK owner. After shooting 200rds through my USP I noticed all brass marks near the ejection port. I have never seen this happen with any other pistol I have shot. Is this normal?
Ejection mechanics differ between guns. I see tons of it on the Walther PDP and none of it on the HK P7.
 

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I don't see it on most of my pistols other than my Walther PPQ. If it bothers you it can be removed with bore cleaning solvent. I think regular Hoppes NO 9 would remove it if that area was dabbed with it and left on for an hour or so. I used some Pro-Shot coper solvent I had on hand for my PPQ and it did a good job of quickly removing it. Some bore solvents are pretty harsh though so as always read instructions carefully and some can even damage poly frame .
 
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