Black powder is easier in my opinion. It is not so critical and a few grains either way doesn't seem to make a jot of a difference. I just use old powder measures that were graduated for drams. I find that 2 1/2 dram black powder and 1 ounce of shot is a well balanced load in a 12 bore. I just use ordinary plastic cases and use them just once. Card and felf wads are a must; the long slow hot burn will start to melt plastic wads and cause a real headache at cleaning time. Primers are not critical either. Lagopus.....