Yeah, the original article from a couple years ago as well as the ones others have posted on here suggested that there would be 2 versions of the ammo, and possibly brass components, for Mil/Civ. The fact that they have now decided to make the 80k psi avialable to Civ is new, and they still may make separate all brass cases at the normal SAAMI pressure ranges in the 60k area.
However, the direct quote from Sig in the 2nd article you reference from my post is not wrong. It's a direct quote. The Sig Cross is made by Sig to withstand the pressures of the 277 (80k psi), you said so yourself, and so did they, which I quoted. Therefore, the Sig made rifle is the exception, not the rule. This ammo should NOT, per Sig, be fired from a rifle not intentionally built to withstand those pressures. In other words, don't rebarrel your Remington 700 for this round. I don't need to call Sig, they already provided the quote.