I've shot a bit of the S&B buck, and it leaves nasty lead streaks in my bore which are really hard to scrub out. Presumably, this is because S&B doen't use a full-length shot cup to protect the pellets from the barrel, or vice versa.
Other loads I have tried use a full-length shot cup, and leave my bore much cleaner.
The S&B patterns wider in my gun, too. Based on the width of the lead streaks in my bore, this is because those pellets are seeing some notable deformation.
So I switched to a different brand (Federal) because I wanted the tighter pattern and cleaner bore. But I don't see any reason why S&B couldn't work. The 12 pellets vs. 9 pellets could be an advantage, I suppose.