I suspect more big game has been crippled with buckshot than actually ever made it onto the meat pole. Everyone I ever talked to that mentioned using shotguns, and buckshot, for big game, were not hunters, were driven mostly by need, and usually were a little short on hunting ethics.
My grandparents on my mothers side of the family were from rural Arkansas, and Missouri, and made a living subsistence farming. the Missouri side had an old single barreled 20 gauge shotgun they used primarily for snakes, and protection, and two muzzleloaders in .32 cal. and .36 cal. that they killed deer and hogs with. The Arkansas side of the clan had a brass shell cartridge shotgun in 10 gauge used mostly on chicken hawks, snakes, and skunks. , and a 25-20 rifle for deer and hogs. I heard both sides of the family ridicule neighbors that hunted with buckshot, because of all the game they lost.
Hungry Horse