THE FACT ABOUT SUPER177 THAT NO ONE IS SUGGESTING

I would absolutely try them. There exists not reason that they'd not get the job done just good as part of your Beeman. I have had excellent luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so on.). I might check out a tin and see how your Grizzly likes them as all guns seem to have their beloved pellets.The RWS Superdome