Now that you mention it, I should probably toss the last box of that ammo just in case it was a bad lot.
So one round got stuck in the barrel, but the next shot pushed it out? I wonder how far down range they went?
I hate to say it but I have had trouble with Silver bears QC.
It was just once, but they put a 5.56 bullet on a 5.45x39 case.
It resulted in a bullet lodged in my barrel.
When I smacked the charging handle on a table the shell extracted, but left the 5.56 bullet up the chamber
Thank God it or the one after it never fired, because the breech never closed.
I sent the whole case back to Russia.
That is the only time I ever had an issue with silver bear.