The thing that bothers me is that the rest of us are still at the mercy of these companies. The OP wasn't hurt in the explosion, so no big deal huh? It's only one in a million.
What does it take for the companies to make a statement about what happened. If they don't know and do not intend to pursue, they need to state that. Once the evidence goes to these guys and they disavow, the chance of ever finding out is
close to zero.
So the OP has a new gun and all is not right. He seems like a really nice, fair, family man.
There will be more explosions until somebody cares more about the next guy, than themselves. It will also require that they have enough money to hand the evidence over to a testing lab without an inherent self-interest conflict. There are many examples where companies have paid off complaints and suits and kept selling bad products.
I love Ruger. Hell, I live in Prescott where they make them. I have dozens. But for several of you to give Ruger a pass is inconsistent with logic and reason. I wish they would comment on their findings rather than not repairable.
I don't believe in a lawsuits; they suck for everybody. I do believe it's all of our responsibility to find the facts for the next guy. Damn, I wish you had found those shells.