Rick Grimes is a badass. Nice signature moment, long overdue.
And since he was "thinking about the baby," as he told Olive Oyl, there won't be any of his usual anguish & remorse. Plus, he just protected Hershel and his family from an onslaught of unsavory bandit-types, so that oughta buy him a few favors.
However, watch out for the rest of the unsavory bandit-types, who are likely prowling around and will eventually find their buddies in the bar.