I personally think that BC is a bit of a gimmick, and right much overpriced. It patterns evenly, but I haven't noticed that it responds to choking at all. Skeet shot the same as IC, LM and Mod out of my gun. The hulls rust faster than every hull other than Kents (but for less than half the price.... who really cares).
I think that theWin Supreme's are the best quality, most consistant steel load on the market. I use their 12ga 3" #3s to the exclusion of just about everything else for ducks. I step up to #2s or BBs for geese. I shoot 3" #3 Kents out of my 20ga.