NOT KNOWN DETAILS ABOUT SUPER177

I'd definitely try out them. You can find not cause that they might not perform just wonderful in the Beeman. I have experienced superior 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 appear to have their favorite pellets.High quality ammo,