THE FACT ABOUT SUPER177 THAT NO ONE IS SUGGESTING

I'd personally undoubtedly try out them. You can find not purpose that they'd not do the job just good with your Beeman. I've experienced very good luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etc.). I might try out a tin and find out how your Grizzly likes them as all guns seem to have their most loved pellets.Umarex 12 G