I would surely test them. You can find not rationale that they might not get the job done just high-quality in the Beeman. I have experienced superior luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etcetera.). I might consider a tin and see how your Grizzly https://super17757766.blogsuperapp.com/36591114/not-known-factual-statements-about-super177