NOT KNOWN DETAILS ABOUT SUPER177

I'd personally absolutely attempt them. There's not purpose that they'd not work just fine in your Beeman. I have experienced fantastic luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd personally try out a tin and find out how your Grizzly likes them as all guns seem to have their most loved pellets.Get FRE