Wow, who think's up these question's? When the case is chambered the case head is in the same place it was before it was chambered. The separation of the case's in the photo show a few case's where there is to much slop in the action. The shoulder is back to far allowing the case to pull and separate. You can easily change the position of the shoulder by partial sizing. I doubt there's any way you can change the position of the head by sizing!
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