NOT KNOWN DETAILS ABOUT SUPER177

I'd personally unquestionably try them. There's not purpose that they would not function just wonderful as part of your Beeman. I've had excellent luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd try out a tin and find out how your Grizzly likes them as all guns appear to have their favorite pellets.So look