SUPER177 NO FURTHER A MYSTERY

I would definitely try out them. There is not motive that they might not function just great inside your Beeman. I've had good luck with RWS pellets in all of my airguns (Hatsan, Crossman, Benjamin etc.). I'd personally try out a tin and see how your Grizzly likes them as all guns appear to have their beloved pellets.Top quality ammo, I hardly ever