I can't speak for Wolf's .30 Carbine ammo but just read on another forum that Wolf related problems are not usually found if shooting only Wolf ammo.
Problems arise when mixing brass cased ammo after shooting a fair amount of Wolf.
As I read it, the Wolf ammo case does not expand like brass and powder residue blows back. When brass cased ammo is shot, it expands against the powder residue and the case sticks. It has nothing to do with the cartridge's laquer coating
Here's the link. This info was for 5.56 in AR's I don't know if any research was done on other calibers.
Very interesting perspective on steel cased 5.56 ammo.
http://www.theboxotruth.com/docs/edu18.htm
27hand