Yep, all of us who are playing with black powder in smaller cartridge guns owe a big debt of gratitude to John Kort. He has done more for black powder shooters than anybody else I can think of recently, and has spent a tremendous amount of time and resources to learn and help others to have success in this venture, for centerfire and rimfire enthusiasts. Whenever you see his posts on the various forums you can thank him for his work and take what he says as truth.
Plus, I won a pistol caliber levergun match yesterday shooting black powder and using tricks I have learned from him over time. I would never have thought it would work so well, but he did all the hard work and figured it out for us!