I'd undoubtedly try out them. There exists not reason that they might not work just fine in your Beeman. I've experienced fantastic luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etcetera.). I might try out a tin and see how your Grizzly likes them as all https://super17745555.blogunteer.com/34923562/the-definitive-guide-to-super177