I've been having some trouble getting good groupings with my b26-2. I've tried rws superdomes, gamo match and hunters. They're all ok, but nothing I would call a "good group". I am hesitant to blame the gun, it's probably just me. I have to learn how to hold this thing, as I imagine this is the problem. I tried a bench and full stock rest, but it was worse with the stock rest.
My best shots I've found are shot from a prone position.