So I shot this revolver a couple of more times - with the same result - I couldn't get to group. The last time I shot it was probably late 2014, for after that, I entered into my "military period" which lasted almost two years, during which I bought and shot an M-1 Garand, a Remington 1903a3, a Beretta M9, a Sig M11-A1, and a Sig manufactured AR-15. Of these guns, the Garand and the Sig are major disappointments in that the Garand shoots about 8 MOA, and the Sig and I don't shoot well together either. They may be going down the road.
Anyway, earlier this year, I got back into revolvers, shot the 686 again, and it still wouldn't group. So I thought, this is ridiculous, and sent it back to Smith. They had it about 6 weeks. When I got it back, it came with a note that they found not only a bad crown, but bad rifling as well, so they replaced the barrel. Shot it the other day, and now it shoots very well. Got to love a 3" 686!
Thank you very much, Smith & Wesson Customer Service!