I knew Elmer Keith back in the 1960s when I lived in Montana; visited Idaho often, and after his telling me about his NED 10 ga. mag., he convinced me to buy one too. I searched, and found one in Wisconsin, a #2 grade in excellent condition that I bought. I shot a lot of geese, ducks, and pheasants too with that gun, and I loved it. As Elmer told me, they are overbored slightly, and that is reason they pattern so well. I traded it off as part payment on a Westley Richards .375 mag. double rifle, in the 1970s. I now have in my collection, a Super 10 gauge Ithaca, #4 grade that I like too.
Too bad I was just a snot nosed teenager in the 60's. I would have enjoyed sitting with the grand old man in person and just listen. I still have all of my old Guns and Ammo mags when he was editor.