Texas10 wrote on Aug 12^th, 2015 at 8:06pm:

Here's view of the heads.   (You need to Login   (You need to Login

I suspect you're misinterpreting the difference in surface texture between the portion of the case that has expanded to contact the chamber and the solid head that doesn't expand to contact. This is completely normal and benign.

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This visual effect should not be confused with the thin "bright ring" indicating the case wall has stretched somewhere ahead of the web/wall junction.

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Incipient head separations (and a USGI extractor at right).