I was very disappointed with the American Rifleman Magazine response to the question. The question was basically, why can I shoot steel case in my SKS’s and AK47’s without a problem but my Ruger Mini 14 chokes? All the dope bag writer did was call Ruger and was told this oxymoron, essentially, “our guns malfunction with steel case ammunition because they are so precisely built.”
This old, like 1991 thread, is worth reading, I have only copied the beginning.
https://groups.google.com/forum/?hl=en&fromgroups#!msg/rec.guns/S_dalM1NJe0/cBSU4bR2jz8J
As for Tula wrecking rifles, I suspect it has happened, unfortunately, it used to be that American ammunition was the gold standard and now with increasing frequency, more and more posts on crappy American ammunition are appearing on the internet. What I would be most concerned is cheap surplus ammunition which was discarded for two reasons: it was unsafe to store and unsafe to shoot.