I have never used any Herter's ammunition, and it is evidently being discontinued at Cabela's. I have spoken with other folks that tried this 16 ga. load. They reported stiff opening and extraction in guns that normally gave no trouble. That's usually an indication of high pressure and/or unsuitable powder selection.
I certainly respect Mr. Vicknair's opinion as to the brazed joint. However, it seems unlikely to me that this alone caused the failure.
I am sure I'm not alone in hoping that further investigation is underway, and that we can learn more from this incident.