NOT KNOWN DETAILS ABOUT SUPER177

I'd personally unquestionably try them. There's not purpose that they would not function just high-quality in the 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 appear to have their favored pellets.The