SUPER177 CAN BE FUN FOR ANYONE

I'd personally absolutely test them. You can find not reason that they would not function just fantastic with your Beeman. I have had excellent luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd test a tin and find out how your Grizzly likes them as all guns appear to have their favored pellets.Umarex twelve