I run all types of Steel Cases Russian Ammo thru my AK-47. Ive had no issues.. I use either Wolf or Tula..
That Said I wouldnt run it thru my Bushie, Colt or Stag AR-15's, thats just because I choose not too..
I treat my AK like a Whore Mistress and the AR's gentle and kind like the Wife..
I do have a stash of 2k in .45 Rds of Steel ammo for my .45 and 500 for the wifes 9mm, but thats in case of the SHTF scenario..