California law allows turkey hunting with air guns over .20 caliber. Talked with several game wardens about this and they say a head shot is a dead-right-there shot, but nothing else likely to work on turkeys.
With practice and the right ammo for the gun, the scoped and zeroed-in pellet rifle does group shots at 25 yards in areas little bigger than a dime. Target shooting first to get the system optimized, then rabbit and squirrel hunting to be sure everything is a go in the field, then maybe a very free range Thanksgiving turkey this year!