I just finished prepping ~500 .357 Mag once fired cases. I cleaned, sized, de-capped, flared, and re-primed them (with Winchester primers). The Winchester cases were the most difficult to work with. They all had tight primer pockets and two cases would not fit into my Lee Auto Prime shell holder. One was nickel plated while the other was not. The Remington cases were filthy dirty with soot and crud. I checked and all were factory loaded with 125 gr JHP bullets. The Federal and PMC cases were consistently the nicest to work with. All the brass came from factory ammo that I fired over the past 30 years. They were fired in either a '77 Ruger Blackhawk or '61 Colt Python. I haven't shot my Python in over 15 years and recently rediscovered it. I almost forgot how much fun it was to shoot.