I've shot countless thousands of rounds of steel-cased ammo in various guns I own from my Sabre AR, Kimber Warrior, Glocks, Colts, etc...

I've not had any more failures with Wolf or Bear ammo than I've had with brass. The Russian stuff is far dirtier, though.

The Warrior I had shot Wolf FMJ ammo like it was match-grade stuff.

Having said that, I've seem more than one gun that wouldn't work at all with steel-cased ammo.

I make certain that any gun I plan on keeping (with a few exceptions, like my M1A) runs well with Wolf, Bear and any other steel-cased ammo because it's plentiful and inexpensive.