Today i have read about, low or no powder charge, an over charge, and a primer blowing up while reloading. I believe the main cause for all this is the use of progressive reloading machines, either not set-up properly, not using a "powder checker", operator error or inexperience. I have reloaded every kind of shell imaginable, black powder and smokeless, in over 40 years of reloading, and have never had this happen, ALL WERE DONE ON SINGLE STAGE EQUIPMENT!! I do the following checks while reloading,a) check flashhole after depriming b) check powder levels of rounds in loading block with a flashlight before proceeding c) check OAL of loaded rounds...In addition, i try to select powders that are too bulky to allow a double charge, and check the weight of every charge on a good scale. None of this is presented to gloat or boast, I believe alot of new reloaders/shooters are getting ahead of themselves and maybe should go back to reloading 101!!