That I need to clean all the packaging grease and whatnot out of the bore before I go shooting a bunch of primers off. I have been scrubbing and scrubbing and got most of the bore looking like a mirror but there are a couple little spots still I'm trying to get off. I went and got some Birchwood Casey Bore Scrubber and it is taking it out but not without a fight. I'll just chalk this one up as a lesson learned.