Depends on the laws where you live. Here in NY, we can't use buckshot on deer. If using a shotgun, deer are slug only. If you even have 1 shotshell in your pocket, you lose the deer, your gun, your hunting privleges for atleast 5 years, and quite possibly your freedom. Check your state game laws, they will tell you what you can and can't use.
I have chopped in half a live cedar tree 3 inches in diameter at very close range and the tree fell down! I was using av12 gauge 2/4 inch in a #5 shot size small game magnum load. The wad didn't have a chance to open and it was almost like a solid projectile! Think of what that would do at HD/PD range never mind what the buckshot loads will do would do to a BG! Easy to check out and VERIFY what I just said in the woods! Enjoy!