I decap my brass, then I clean them in an ultrasonic.
I find that, after a total period of about 30-40 minutes (4-5 cycles of 8 minutes with breaks in between). By the end the water is pretty warm and I am pleased by how clean brass comes out after such a short period of time.
Primer pockets are cleaner, but not spotless. There are sometimes patches of sooty residue. I have a Lee pocket cleaner for those.
So in short: they don't come out shiny like new, but a lot better. The rest of the case is typical all clean.
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