That's not a safety issue, only an aesthetic one. The one thing you need to stop doing is attempting to correct it yourself with a Dremel. The last thing you want is to adversely effect the chambers tolerances out of your desire for perfection.

Yeah you are right but i did only use a felt together with some KG2 bore polish rotating at lowest Speed to smoothen it out. Nothing really abrasive. I would not start honing it or something like that. I think it got to live with it and Keep on Shooting it as it is.