RE: Muzzleloading shotgun questions
82 grains would be 3 drams. I would guess 1 1/8 to 1 1/4 oz shot should pattern well. (80 or 90 grains on a powder measure)
If it were mine, I'd start off with 70 gr ffg powder & 70 gr shot. (appx 2 1/2 dram/1 oz load)