Just an Update. I have been shooting Pinnacle for over 4 years and I continued with my practice of dropping the fired cases into a wide mouth jug of water with a shot of Dawn Liquid Detergent in it. I have been doing this since the late 1990's when I started shooting Black Powder, Pyrodex, APP, 777, and Pinnacle. All my brass, be it .44 WCF, .45 Colt, .45 Schofield or Metallic 12 gauge Hulls. In all cases once home the jug gets drained, refilled with hot water at least three times, shaken in-between hot water baths. The last rinse is cold water and then the drained shells and hulls are laid out on a towel where the hot Maryland sun can bake them till they dried. Once dried they end up in my tumbler for eight to ten hours and they come out bright and shiny.
YMMV