There is no definitive proof it was the fault of the ammo. I am also the 3rd (at least) owner of the gun, so I have no clue how the gun was treated before me. I want to make it clear that I have no clue why the chamber failed, just speculation.
The rep at the ammo company did misrepresent the scope of the release on the phone. My guess is he never read it.
The ammo manufacturer that I was using at the time was Freedom Munitions. I was shooting 180gr hollow point, copper jacket, nickel cased, re-manufactured ammo.
They did offer to cover it, I have still been purchasing and shooting there new run stuff since this happened.