NOT KNOWN FACTUAL STATEMENTS ABOUT SUPER177

I might surely try out them. There exists not explanation that they'd not operate just wonderful with your Beeman. I have experienced fantastic luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etcetera.). I might test a tin and find out how your Grizzly likes them as all guns seem to have their preferred pellets.Umarex 12 Gram