I like #6 Hevi-shot, but that's because it patterns best in my gun, I've tried 4s and 5s, didn't like the holes in the pattern. Shoot what patterns best at the range you limit your shots to and you'll be happy.
I've also shot some of the new Flight Control Federal lead rounds, they had very good pattern density at 40yds, I would recommend you try it as one of your choices. Be aware of one thing tho, shooting at close range, there is no pattern spread, out to about 12-15yds, it's more less just one projectile, so better make sure of your aim!!
What works well in 2 identical models of guns/chokes may be entirely different, so be sure to pattern your gun for the best load.
Tim