RE: What choke for hevi-shot?
Nitro does recommend the Rhino choke for their loads of hevi shot. I am very impressed with the Nitro loads combined with the Rhino choke, both on paper testing and actual performance in the field. I think they have done their homework and came up with an excellent product.
If I' m not mistaken, Remington introduced a special hevishot choke tube when using their brand of hevishot.