Curious what you found out on the ones you pulled down... Any with no powder??

I load both on a single stage and a Dillon 650. I do not trust anything mechanical and visually look at every powder charge. Having started and used single-stage for a couple decades before getting the Dillon, I was really used to looking at a loading tray and comparing powder levels. Made looking at the one case at a time on the Dillon disconcerting. As time went by and I had 20-30,000 rounds loaded on the Dillon, I came to get used to looking at just the one case and now looking at a loading block freaks me out... I put a small LED light on my Dillon and see every powder charge. Never a question.

I also minimize distractions by keeping the door closed and phone off. If I do have to leave, I stop with all the stations full, exactly in-process, and put the machine cover over the press. When I come back, I remove cover and inspect each station to be sure everything is as I left it. I never doubt my loads...