A quick aside for those of you who have had overcharge issues. I am a pretty casual reloader. So that I might learn from your mistakes (and perhaps others may too) I'd like to ask you if some of my practices would have precluded the issues you had. If I am throwing charges, I will check a few along the way. Once I have finished charging the cases I take a flashlight and look down into my charged cases to ensure uniformity prior to seating bullets. Would that have prevented your overcharge issues?
Visual inspection, after charging, before seating, is never a bad thing. It only takes 30 to 60 seconds. And may save some excitement later. I always do a visual inspection when charging a full block of cases.
However, for my situation of load development (3 cartridges at a time), it would not have made a difference. For load development I charge, seat, charge, seat, charge, seat, 3 cartridges and then go shoot. Given that it was both a new cartridge and a new powder for me at that time, I did not have any idea what the "normal fill level" was supposed to look like.
