I am surprised at some of the distances people claim to use buckshot at. I have four shotguns and none of them pattern worth a darn with buckshot. The best hunting here is in areas that allow buckshot only, so I have adapted my hunting to point blank range. Over the past 7 years, the longest shot I have taken on a deer was 15 yrds with my closest being almost touching the muzzle.
Yesterday, I had a broadside shot at a standing deer at about 30 yrds. It dropped in it's tracks and was dead by the time I walked up on it. When it was skinned out there were two pellets that entered below the spine, one through the guts, one in the ass and fortunately for both me and the deer,...one through the noggin.
If not for that one lucky pellet through the brain, a wounded deer might have died a slow lingering death in the bush.
I am no fan of buckshot but it does work well if you are close enough for how your shotgun patterns.