Sounds almost like a medical condition doesn't it? 
I load .308 for a Norc M14 .. I full length resize brass recreating M852 rounds (7.62mm).
I have noticed in the past very subtle dents in the shoulders of my full length resized brass in a lee challenger press using lee .308 fl resizing die. They were so subtle in the past that I just ignored them and the rounds were very very accurate.
With this new set of 50 pcs of Winchester brass, I FL resized, loaded and fired them once. The second time I have resized them, I am noticing some very pronounced dents in the shoulders of many of the cases. Cause for concern? Am I doing something wrong? Should I ignore them?
Thanks for your advice...

I load .308 for a Norc M14 .. I full length resize brass recreating M852 rounds (7.62mm).
I have noticed in the past very subtle dents in the shoulders of my full length resized brass in a lee challenger press using lee .308 fl resizing die. They were so subtle in the past that I just ignored them and the rounds were very very accurate.
With this new set of 50 pcs of Winchester brass, I FL resized, loaded and fired them once. The second time I have resized them, I am noticing some very pronounced dents in the shoulders of many of the cases. Cause for concern? Am I doing something wrong? Should I ignore them?
Thanks for your advice...