Certainly my favourite at legal limit. I find my rifles go really well with either FTT (11.4 grain) or JSB (13.7 grain).
At FAC power levels it is more clear cut in my experience. I set my rifle to produce 800 ft sec with the most accurate pellet which normally turns out to be the JSB 13.7 grain so making the power ~20 ft lb.
Crosman Premiers are problematic and I don't really know why. I find most barrels I have owned go better when paired with JSB. However if the Premiers go well for you they are devastating as the higher antimony content of the lead mix makes for a harder pellet.