The powder residue (soot) is black, and there's a bit too much of it on the sidewalls of the cases. Mostly inside them.
The copper coloring is fused with the cases, it cannot be scraped or tumbled.
I assume the chamber is perfect. The gun is a S&W Target Champion 9mmP from their Custom Center. It has had around 2,000 rounds thru it.
Crimp diameter: 9.65mm
OAL: 28.70mm
Frontier bullets. TMJ, the soft ones.