I would stay away from the lacquered stuff. "Bear" ammo basically comes in 3 grades, low grade Brown Bear is steel cased ammo with a dark lacquer coating to avoid corrosion, medium grade is the Silver Bear, steel cased with a zinc coating to avoid corrosion, and Golden Bear which is their best, steel cased with a brass coated steel case. All Bear brand ammo is made by Barnaul and is notoriously dirty to shoot, more especially the Brown Bear, the lacquer can gum up your chamber and extractor. I shoot Silver Bear a lot, very dirty. After approximately 6000 rounds through my Del-Ton I have had no issues and the extractor looks fine. I would say shoot up what you have, clean very well and next go-round try some Silver.