I'd rather not shoot Wolf in any US gun. I buy all I can get for my AKs, though! The thing about the ranges banning it is unfortunately true. This attitude is based on ignorance. It started when they thought steel-core ammo was destroying their iron target frames, but the steel-core ammo available in the US for the AK is not 'armor-piercing'. Then the manufacturers started making all the AK and other ammo for the US lead core. That was around 1992 or so. The steel casing couldn't possibly cause any problems, and it will eventually rust away. The bullet jackets also contain steel, but it's an alloy called 'tombac' and is not much harder than copper - but it will be attracted to a magnet.
So, there is no good reason for banning this ammo, even if it were 'steel core', which it is not. Print this off and take it to your range. Make them tell you why they have banned steel case ammo. I'd be interested in knowing.