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After years of research and experimentation I finally mastered the art of Color Case Brass!
Well, not really ! I was pre cleaning the brass .357 with some aluminum 9mm in my tumbler with dawn, apple cider vinegar and spent primers as media (yea they work great as expendable media) and the brass came out this way.
I suspect the aluminum had something to do with it as brass only with the same solution comes out bright and shiny!
It will no doubt be gone at the next 'real' tumbling session with pins.
Well, not really ! I was pre cleaning the brass .357 with some aluminum 9mm in my tumbler with dawn, apple cider vinegar and spent primers as media (yea they work great as expendable media) and the brass came out this way.
I suspect the aluminum had something to do with it as brass only with the same solution comes out bright and shiny!
It will no doubt be gone at the next 'real' tumbling session with pins.