I must have misread your previous posts. I thought ALL of your failures like this were with the Victory. So I was looking for the common element. What is common to all these failures? The Victory (or so I mistakenly thought at the time), and probably the storage conditions for the ammo. Other than that, everything else appears randomized from your description. There's got to be some common factor that is causing these failures for you. Finding that common factor can be difficult though. But once found, usually you slap yourself in the face and say, "So obvious, I should have thought of that!"

I'm an engineer BTW, in case it doesn't show!