Finished up loading 800 rounds of 9mm today (thats pretty much a bottle of Blue Dot with my range load) and while i was in the process, one of the casings seemed to enter the sizing die really easily. Mmmm? I thought to myself, that does not seem right. Turns out an errant .380 brass had gotten into the mix and was about to head off down the production line on my 550b. Trying to shove a 9mm bullet into that casing might have been interesting. Needless to say, i need to do a better job at checking my brass before throwing it into the tray for loading! Anyone got any good stories of mixing brass on the press? And while i'm at it. I did let two rounds drop off the line without primers. That's always fun. Good thing i QA when i'm done loading.