I would undoubtedly consider them. There exists not purpose that they would not function just good inside your Beeman. I have experienced superior luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so on.). I'd attempt a tin and find out how your Grizzly likes them https://super17744332.madmouseblog.com/16519833/the-super177-diaries