I might absolutely test them. There may be not rationale that they might not get the job done just good within your Beeman. I have experienced superior luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etcetera.). I'd personally test a tin and see how your Grizzly https://super17740110.blogpostie.com/57309870/super177-no-further-a-mystery