Harborkiller. I don't know where you live, but a .60 caliber ball is NOT BUCKSHOT! I have no doubt that 3 .60 caliber balls will kill a deer. ONE .60 caliber. Roundball does quite well, thank you.
Buckshot has specific sizing, and dimension. #4 buck is the smallest in diameter, ( and weight) at .24. 000 Buck is the largest and the heaviest, at .36"
Here is a table of buckshot sizing:
#4 Buck = .24
#3 Buck = .25
#2 buck = .28( rarely seen or sold these days)
#1 Buck = .30
#0 Buck = .32
#00 Buck= .33
#000Buck= .36( some manufacturers make this at .35")
If we don't understand the language, then we are not likely to be communicating about the same things, NO? Those Triball loads are totally different than Buckshot loads.
Roundball and I are talking about using Buckshot. Neither of us is impressed with it, because beyond 15-20 yards, the pellets do not weigh enough to do much penetration. That means you are wounding the deer, and it is doomed to suffer a slow death, unless you get lucky with a neck or head hit.
Again, in some locations, the deer are so small, its like you are hunting dogs, not deer. It doesn't take much to kill a 35-50 lb. animal, dog or deer.
Having said that, the first time I worked a deer check station, back in 1968, a man brought in a fawn that weighed 35 lbs. dressed, and the little guy had been hit 13 times with shotgun slugs, before falling dead in front of him, after he shot under the belly of its mother. He didn't even see the fawn, until the smoke cleared. He tagged the deer and brought it into the check station, sick at heart that the little guy had been killed.
Apparently a family lined one side of a ravine the deer used, and opened up on deer as they ran up the ravine. None of them was using a shotgun with a rear sight. None had made any effort to sight in their guns for a particular brand of shotgun slugs. They bought the cheapest ammo on sale at K-mart, whatever brand that was that year. He didn't even know that different brands shoot differently in his gun, and that the slug would hit a different POI.
The carcass looked like Swiss cheese. He said he was going to grind up all the meat for venison burger. I had a lot of respect for the man for using his tag on that little deer. He could have left it lay, claiming it wasn't killed by him, and wasn't his deer. That would have let him blast away during the rest of the season in hopes of killing a bigger deer. Instead, his season ended with that deer. I heard him talking about getting a " slug barrel " for the next season.