You'll have to experiment with your gun and choke and see what it likes. There's no magic rule that applies across weapons.
That being said, Federal does make some nice patterning buckshot and I would try it first.
00 buck has put a lot of meat in the freezer over the years. Use what ya' got - in the safe and between your ears. Don't let the nay sayers slow you down.
.44 Special: For those who get it, no explanation is necessary. For those who don't, no explanation is possible.