The chokes that most of my readers have had the best results with in Ithaca guns are the Wright's limited production turkey chokes.
They are non-ported, with crowned muzzles, 1.3" of parallel section and made from ETD 150 PH steel. With Hevi-13 shells, including Magnum Blend, the .660 exit diameter works well.
If I were going to shoot lead shells, I'd have to go with the White Lightning shells. That's be best lead load on the market today, in my experience.
Thanks,
Clark