Bought a 9mm Shield two weeks ago. The weapon was dismantled, inspected, cleaned and lubed prior to first firing. Within the first 20 rounds I had FTF and FTE issues. I found divots/pitting on the lower edge of the feed ramp when I inspected afterwards. Used AE, Winchester and Blazer brands with 115 grain for the first 20 rds. Thought maybe it was an issue with ammo but all brands had issues. I understand new tight guns can have issues but metal markings on the feed ramp? S&W has no idea but is looking into it. I have a hard time understanding how brass could create those markings. Anyone have similar issues?