.... Users have reported that the primers in the tray of an Auto Prime can explode for various reasons - some of which include a cocked primer, or an attempt to prime a case which has a primer already in place, or more than one primer on the punch, or priming a military case with the crimp not completely removed. Should an explosion occur, our tests have demonstrated that safety glasses will normally prevent serious injury to the user if the primer brand and quantity of primers are used. Other primers, especially FEDERAL, can explode with sufficient force to seriously injure the user, or persons nearby.
OK, thanks for the info. I had read the same info on the new primer I received from Lee. The "lid" on the one I have been using for about 15 years has warped, and sometimes lets the primers turn on their sides. So I ordered a new primer, couldn't find just the plactic lid. I will proceed cautiously.
A decent quality face shield like used for grinding might be a good investment, I'm saving up my brass to eventually start reloading and the thought of primers going off crossed my mind, I think they are only about 10-15 dollars.
the federal primers wont explode if pressure is applied.it is the heavy handed impatient operator that will do it.I have been loading since 1937 and have never had a primer go on me.I have 15 presses and load about 25 different cartridges.