I'm going to be trying that one of these days, but I'm more concerned about the inside of the case, esp. if it could corrode from long time storage or crappy powder. For primer pockets, I use my Sinclair uniformer to clean them. It doesn't seem to cut particularly well for a carbide cutter. Another cleaner is to take a cheapie flat blade screwdriver and file the end FLAT and the sides STRAIGHT so it just fits into the primer pocket. Used together, the uniformer and screwdriver get em clean in a jiffy.