Me too, me too. I reformed 30-06 brass into 8mm I ran it through the 8mm resizing die two times in a row and then loaded. I loaded about 40 rounds, only to find that they wouldn't chamber. I then found out that although the shell holder was touching the die, there was some play and when a case was inserted in the shell holder and the ram moved all the way up, turns out there was about 1/8 inch of space between the shell holder and the die. So, it wasn't quite being fully resized, which is essential when reforming brass for the first time. Anyway, that's my story. Deprimed and reloaded--not a problem. Like others have said, go slowly.