If it comes up, I will be honest then about the loading. But if it was a known problem, it doesn't seem like the load had anything to do with it, and they probably won't even ask.
That must have been some damned corrosive thread lock, to eat into barrel-grade stainless steel like that. I suspect it was a bad batch of castings, and they didn't want to admit that this could happen with their castings, since the S&W were looking for a chink in the armor already.
Thanks for that quote, Sport45. It seems like this would have happened even with the extended frame at the front. (which I think looks hideous, by the way)