Why is a tendency to bowl narrow so common?
A narrow delivery is really one where the delivery angle is not sufficient for the bias of the bowls in use. When bowlers switch to newer bowls, they may imagine that the newer bowls have an appreciably narrower line when that is not the case. Some bowlers indulge in much trial and error before they correct this problem. Another cause of narrow deliveries is that some bowlers feel worse about deliveries that finish wide compared with deliveries that cross the head and finish narrow. In both cases, they err on the side of being too narrow.
