In the episode Soprano Home Movies (S06E13), we learn that Bobby Baccaliery has never "popped his cherry", that means
he never killed a man.
However, Bobby has been promoted capo in the episode For All Debts Public and Private (S04E01).
From what I learnt in these crime organisations, it is the kind of mission that they all have to do once in a while, to keep them commited and have their hands dirty.
So how did he gain trust from the other members of the family, and climb the ranks of DiMeo organisation, without ever commited this act?