CR-
Do you ever have any problems with the knock downs using that load? If not, it sure sounds like a good one. Nice and gentle for folks with shoulder problems, or smaller shooters.
I've found that black powder loads are actually easier on my shoulder than smokeless loads with the same amount of shot. Recoil velocity is slower, so it gives my big blubbery frame more time to roll with the shot gun. In my 20 gauge, I'm using 65 grains of Goex Fg, a Remington wad with the cushion section removed, and my bushing is supposed to be throwing 7/8 ounce of #7 1/2. I've weighed the powder to double check, but not the shot. By removing the cushion from the wad, but still using the gas seal and shot cup, I have room to get a good crimp on 2 3/4" hulls. My wife likes this load a lot, and she's less than half my size.