I called Century Arms and spoke to someone who was supposedly a Yugo AK knowledgeable person. I asked him a simple question. Can I shoot steel case ammo in my Yugo M70 ab2 and not harm the rifle? He would not give a straight answer, he only said brass was the best and steel case would be ok from time to time. Again I asked, "Will it harm my rifle"? And again he would not give a yes or no answer! My local gunsmith said don't shoot it becasue it would ruin the chamber and wear it out! What? Is this true? Somebody help because brass ammo is high and I just plain do not like corrossive due to the cleaning process!