Police trade in G22 (refinished before sale) LWD stock length barrel I ran about 150 rounds through the new LWD barrel, went to clean it, and noticed metal shavings all over the barrel. Since the gun is still very newly refinished it was pretty easy to find witness marks. Previously I've ran about 500 rounds through it with the factory barrel and never had shavings. Are those marks on the slide normal wear and tear or is there a problem? There were actually a lot more on the barrel, but I started cleaning it and then decided to take a picture. I don't see any abnormal wear on the frame anywhere. Since the gun is used, I'm assuming any normal wear and tear from breaking in should have happened a decade ago.