I think you have misunderstood something or someone. I do not use Nason but to the best of my knowledge Nason ALWAYS requires reduction. It is the economic line of DuPont. I have a friend who shoots it regularly and one of the things he has said repeatedly is it tends to require more coats than other brands after reduction but he is a big fan of it.
Hopefully someone will jump in here who uses Nason and can offer you more than an opinion.