Don't know where you're located, but around here crows are considered migratory birds and are regulated by seasons. Maybe you should see if you're violating game laws before you start popping birds out of trees. By the way, a GOOD shot killls game quickly and cleanly. Find out how far away you can consistantly keep pellets in a tight enough group to make a head shot, then don't exceed that range. That is, of course, assuming that you are not killing migratory birds illegally.