NOT KNOWN FACTUAL STATEMENTS ABOUT SUPER177

I would unquestionably try them. There is not purpose that they would not function just good within your Beeman. I've experienced very good luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and many others.). I might consider a tin and see how your Grizzly likes them as all guns seem to have their preferred pellets.Umarex twelv