With plenty of milsurp ammo available, I didn’t care too much about the brass.
I am the same way. In fact, I used to use only NATO milsurp ammo. Recently tried some steel cased 150 grain cheapo ammo. The rifle love it. It grouped well and ran flawlessly.
Even read rumors the G3 was designed for steel case ammunition but have never seen anything official or seen that in any factory publication. All I have found is the rifle is designed to shoot NATO standard ammunition I am not aware of any NATO milsurp steel cased ammo.
It is interesting that the Bundeswehr did use cupro-nickle bullets but I have found no steel cased ammunition.
https://www.outdoorlimited.com/rifl...2030-148-grain-full-metal-jacket-1000-rounds/