NOT KNOWN FACTUAL STATEMENTS ABOUT SUPER177

I'd unquestionably check out them. You can find not reason that they might not do the job just great in your Beeman. I've experienced superior luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd personally try out a tin and find out how your Grizzly likes them as all guns appear to have their most loved pellet