Thread: Time for the bin?

Its caused by lack of annealing. I see it a bit with my 22-250, some cases are split in the neck and some show like yours.

Husky, you maybe right, my experience is lack of annealing show up in cracks in the necks at firing, different neck tension in batches resulting in poor groups and stiffness / stickiness of the case during FL sizing when your trying to get the expander ball / mandrel our of the neck on the upstroke. The deformations here i think is more from having lube or oil, cotton etc in the chamber at firing but again hard to tell without seeing / knowing the whole picture.