My Dan Wesson CCO does not have any brass marks, but it also has relief cuts, which I suspect helps decrease this issue. I have a little over 1500 rounds through it and haven't noticed any brass on it.
I said above that I have a lot of 1911's that don't do this but, I looked at them, and it turns out I have a lot of 1911's with flared ejection ports like Dan is talking about, so maybe it is more normal than I think on the std. model.My Dan Wesson CCO does not have any brass marks, but it also has relief cuts, which I suspect helps decrease this issue. I have a little over 1500 rounds through it and haven't noticed any brass on it.