Is your rifle chambered for .223 or is it 5.56/.223? I have heard that .223 only rifles are more sensitive to ammo, but I am not sure what that has to do with Wolf.
.223 and 5.56 is exactly the same ammo. m855 is the steel core ammo. I had no problems with wolf ammo in my mini 14 but have not had a chance to try it in my AR.
if it is wolf brass, yes if it is wolf steel cased and laquered, run away! For semi autos, that melting lacquer will give you a cleaning headache, plus may make your weapon fail to operate.