I load BP in both brass and plastic.

Magtech brass is thin walled and works best with 11ga. wads. The brass gets dirty and has to be scrubbed if you like shiny shells. I scrub mine about every fourth time. I rinse them in soapy water with a bore mop every time.

Loading is simple, equal volumes of powder and shot (about 1 oz for skeet) and enough nitro card and cushion wads to bring the over shot wad to within a 1/4 or less from the end of the shell. Seal the overshot wad with about any glue, I use Elmers white glue. Hint, do not drop the box of shells, the over shot wad will come loose.

Plastic hulls take regular 12 ga. nitro and cushion wads, some brands of the plastic wads will melt and coat the barrel. You will likely need a reloading press for plastic hulls because the crimp ends make it difficult to insert the wads by hand.
Unfortunately nitro and cushion wads can be hard on the fingers of the press's wad guides.

Black powder is black powder and is only a hassel to those who do not enjoy the smoke and stink. Reloading brass shotshells is like loading a very short muzzleloader.

Good Luck
RPr