You didn't say if the bullets were boat tail or flat base, I have had similar results with certain flat based bullets, they don't start into the case very good in the seater die and when you put pressure on them they buckle the shoulder just like in your picture, you may have to inside neck chamfer to get them to start without buckling.
__________________
The problem we have today is that the people who work for a living are outnumbered by the people who vote for a living.
We were all born ignorant but one must work very hard to remain that way.
|