I'd personally definitely try them. There may be not purpose that they would not function just fantastic within your Beeman. I have had excellent luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd try out a tin and see how your Grizzly likes https://super17733221.slypage.com/36600307/super177-can-be-fun-for-anyone