NOT KNOWN DETAILS ABOUT SUPER177

I would certainly attempt them. There is certainly not explanation that they'd not work just good inside your Beeman. I have had good luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etc.). I'd personally try out a tin and see how your Grizzly likes them as all guns seem to have their preferred pellets.Get FREE shipping on qua