I'd absolutely test them. There exists not cause that they would not do the job just fantastic inside your Beeman. I have experienced great luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin and so forth.). I'd attempt a tin and see how your Grizzly likes them https://super17722110.review-blogger.com/57561900/not-known-details-about-super177