Originally Posted by lever-hed
You may be right.. But, what I’m getting at is this issue seems to be about neck tension. The original poster simply wanted to know what the bulge is all about, and everyone went off on a tangent about neck sizing ability of the die. !
Sorry, that would probably be my fault, but at least we did get some good information out.
I also did some research on doughnut formation, I have never experienced it, but now I know a little more about it.