There are a few dedicate deer hunters in this thread, and it is not easy to use the word "hunting" without it being reflected on deer. So, to them I say I do not shoot deer with buckshot.
My logic for buckshot may vary from many others, but as an example I went after some yotes today through the bush, sat and looked at my 3 favourite guns for the job before I left, .17, buckshot and slugs.. Ended up with buckshot for the simple reason that the bush was thick, 1"-2" saplings in every direction, a max of about 5 yards for a single projectile. I like to think I am good at what I do, but not 5 yards good. With big game it is all calculations and ethics, that moment of release (arrow, bullet, slug, shot)only comes when I know I can get the job done with minimal chance of error, just like the rest of you. But with yotes I simply take the shot and hope that my preparation will pay off.
I have no ill feeling to those who do hunt big game with buckshot, there are people out there who have been at it for a lot longer than me, successfully. To those I say happy hunting and may all your trails lead to your game.