NOT KNOWN DETAILS ABOUT SUPER177

I'd absolutely consider them. There's not cause that they might not work just great in your Beeman. I have had fantastic luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and many others.). I would attempt a tin and see how your Grizzly likes them as all guns appear to have their most loved pellets.Get FREE shipping on qualifyi