Wolf ammo has a reputation for being dirty. The culprit was most likely powder fouling. The reason many warn against steel cases in autos is because its supposed to be hard on the extractor. Revolvers don't use the same extraction system as an auto so I don't think steel cases in and of themselves would hurt anything. I personally won't use Wolf or any other Russian ammo in a Non Russian designed gun (i.e. 9mm Makarov, 7.62x39,5.45.39,7.62x54r) because I've had "issues" with Silver Bear 145grn 9mm before. A Smith is an expensive gun. I'm willing to pay a couple bucks more for Winchester White Box in order to protect my investment.