I was wondering if this was possible. I had a situation where my dillon didn't deprime the brass and when I went to push the new primer in the handle didn't move as smoothly so I stopped and check to see what happened. Now I have had a incident where I pushed the handle forward (by accident wearing all the safety stuff) and it wasn't smooth and it made me think would it be possible to push a new primer into the old one and force it out that way without it going boom. Just curious not wanting to try it.. but makes me wonder if that was what happened the previous time it didn't go in so smoothly.