Shooting doves is an economy of scale.
A mourning dove weighs about 4 ounces. A Eurasian collared dove weighs about 5.3 ounces, and a white-winged dove weighs about 5.4 ounces. Hurling 1½ ounce of lead out one end, coupled with the recoil of a 12-gauge shotgun on the other end, is way out of scale for the task.