NOT KNOWN FACTUAL STATEMENTS ABOUT SUPER177

I would undoubtedly try out them. There is not purpose that they would not perform just wonderful with your Beeman. I have had great luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etc.). 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