I was putting bullets in my .243 cases. I was on about my 4th row of five. Necks were a little loose after neck turning but they were holding the bullets ok. One of the bullets fell down into the case after I had put it back into the loading block. I noticed the empty case after I had loaded a couple more rounds. I thought I had just skipped that particular case so loaded another bullet into the case. As I said, it was about the beginning of my 4th row of five. I went to the range and fired 10 rounds and gave up because my load just quit shooting the groups I was expecting. When I got home I pulled the bullets of the remaining cases and discovered the round which was loaded with two bullets. I can't imagine the damage firing that round would do to both me and the rifle. I dodged a bullet this time. Just a heads up for anyone else to keep in the back of your mind.