SUPER177 NO FURTHER A MYSTERY

I would certainly attempt them. You can find not reason that they might not do the job just great as part of your Beeman. I have experienced excellent luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so on.). I would check out a tin and see how your Grizzly likes them as all guns seem to have their beloved pellets.The RWS