Got my Hornady 223 neck sizing die in today. Set it up and ran some annealed Mossberg MVP shot brass through it. I resized 59 cases and had this happen to 11 of them...
I'm gonna take a guess that these cases may have been over annealed...the ones that I kept in the flame for a count too long.
The remainder of the cases turned out fine...
Now to reload them and see what advantage neck sizing brings to the table for me...aside from not having to lube the cases.

I'm gonna take a guess that these cases may have been over annealed...the ones that I kept in the flame for a count too long.

The remainder of the cases turned out fine...

Now to reload them and see what advantage neck sizing brings to the table for me...aside from not having to lube the cases.
