It's not unethical IF your gun/choke/load have been proven to be able to cleanly harvest a turkey at that range.... But as a rule, 40 yards.... too many noobies read stuff and think because you can do it that they can too and they go buy a gun, shells, and turkey choke, without putting in test time.... only to shoot at a bird and miss or cripple him up escaping.... then they wonder why?