NOT KNOWN FACTUAL STATEMENTS ABOUT SUPER177

I would certainly try out them. There may be not explanation that they would not get the job done just wonderful in the Beeman. I've had great luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd personally try a tin and see how your Grizzly likes them as all guns appear to have their favourite pellets.High qua