Way back when I was a kid we shot a lot of #4 buck because no one in my family had a rifle. Here in the south we hunted deer with dogs and the shots were often close and moving. The larger O and double O buckshot didn't pattern well in my dad's and uncles' modified or full choked barrels. I still have a 10 pt rack that I chipped the brow tine with #4 buck. We also used the load for an occasional turkey, goose, or coyote. Most folks had 2 &3/4" barrels and shot a load of 27 pellets. When I got a 3" barrel, the 41 pellet load extended my range another 10 to 15 yards. I haven't used #4 buck in years but I did shoot a coyote with 3.5" steel T shot at 30 yards and he never knew what hit him.