JSB Hades (22) in a ST barrel?

I've shot them in my Royale 400, and they did fine, as they are the same general diablo shaped pellet. I haven't found them to be as accurate as the standard JSB 16 and 18 gr pellets, but very adequate for hunting. That said, I didn't find them to offer any advantage in terminal performance, so I didn't shoot many od them. Others report a definite advantage with them, so I guess it depends on the specific shot. I consider all of them to offer minimum lethality, so shot placement trumps pellet design by a wide margin.