Originally Posted by Jpyle
There have been numerous threads floating on the forum regarding the steel case used in wolf ammo. Most reliable sources have dispelled the myth that there is a risk of damaging the extractor. The real problem seems to be that the steel casing doesn't fully expand to seal against the chamber wall, this allows hot gases to escape and foul the chamber which may cause problems on later shots especially if brass casings are used without a thorough cleaning. Most agree that Wolf is perfectly safe to use it just requires a more diligent maintenance and cleaning regimen between shooting sessions.
I had a nice exp. with wolf ammo and my old M.A.K. 90. I actually had a cartridge that had no powder in it, I had to beat the bullet out of the barrel with my cleaning rod and a hammer. They also coat their shells with some sort of lacquer to prevent corrosion which is just fine if you are shooting a sloppy Russian rifle, but if you put enough of that wolf ammo through a hot AR that lacquer is gonna eventually build up enough to increase pressure.