Great report lots of information. Myself I have never shot any Russian Ammo. in my ARs and won't ever. I do shoot it in my AKs. I do understand with the way things are heading the Russian Ammo. gets bought because first off it's now or it was easy to find and prices were good. I think soon the Russian Ammo. will be harder to come by also prices will climb up. I hope I am wrong. I did find some copper case and copper coated lead core bullet Win. 7.69x39 and shot it in one of my AKs and if I could afford it I would shoot it all the time over the Russian Ammo.