Almost thought I had ruined by S&W M&P by shooting that stuff. Luckily I was able to extract the round. Never again...
Wolf is great in AK's and SKS's. Polymer or lacquer coated cases will work fine.
In AR's, the polymer coated cases usually work, but stay away from the lacquer coated. They will gum up an AR.
In handguns, most people don't like it. I tried it, but didn’t like the accuracy. I didn’t have a problem with it gumming anything up, but then again, I was shooting it in a Glock.
Wolf now also has their gold line, which is brass cased. Reviews have been mixed.
WWB works for me too. I have not noticed it to be any dirtier than anything else.