There are only two kinds of people - the ones who have already screwed up, and the ones who have yet to.
Less than a month ago, I was working up a load. I was loading 'five of each', and keeping them separate in a labelled cartridge box. At one point, after being interrupted by the phone, I realised I hadn't looked into the last five before seating the bullets. I weighed those five cartridges, and sure as hell one weighed 55.5 gr. less than the other four.
I've loaded for more than 20 yrs, and I still screwed up. Fortunately, I caught it.
I hope when CS45 screws up that the education isn't too expensive. Karma's a #####.