It is curious that killing preserve birds is acceptable to most of us while pigeon shooting may not be. In all cases it is killing with a gun, some clean kills, many not so clean.
I cannot say one is ethically superior to the other. I understand that the pigeons are partially plucked live and boxed and I cannot defend the pain of the plucking.
That said in the end killing is killing, no matter how it is romanticized or idealized.
I have not engaged in pigeon shooting, nor does it interest me, but I cannot condemn it without feeling like a hypocrite