Yesterday I reloaded some 308 Win rounds for a friend. He had several rounds that the bullets needed to be pulled, because he got them mixed up and wasn't sure what they were. So I pulled the bullets and put them right back in the seating die with the new bullets. All the bullets seemed very easy to put in, but I didn't think much of it. This morning I noticed that the bullets were loose and some had actually fallen into the case. I'd never seen this before. I'm assuming where I messed up, was not running the cases through the sizing die after removing the old bullets? Or is there another problem going on I'm not aware of?