Ok tested today with both shot and PRB. Fired 4 groups of 3 shots each at 50 yards. Average off a lead sled bench rest were 1.685 swabbed between each shot.
Now the real reason I purchased the smooth bore from Kevin. Fired 4 paper targets 4ft x 4ft white paper at 35 yards. Used 68 grains FFG, powder card, cushion wad, shot card, 1 oz #6 shot, overshot card. 78 percent of all the #6 shot were inside a 36 inch circle. Certainly good enough for Turkey, Quail, and Dove.
The gun performed much better with loaded powder card/cushion wad/shot card/shot/shot card. Without a shot card between the cushion and shot, it seemed to leave a "hole" in the middle of the pattern on paper. Don't know why unless some shot embedding in the cushion wad.
At any rate, seemed to have found the loads the 62 smoothie likes. Very happy with this gun.
I would like some advice on how to improve the "lock time" I guess you call it. The time between the pan flash and the powder charge going off. It seems quite long compared to some videos I have seen. I did open up the touch hole to 16th of an inch but that did not improve anything. Using FFG powder charge and FFFG in the pan. Do I need 4 F in the pan?