I reload .410 brass hulls, both the Magtech hulls and hulls that I make out of .303 British cases.
The hard part id getting proper components. Hard because most available components are made for modern plastic hulls and are too small/too loose a fit in brass hulls like the Magtech, which have a larger volume.
You really need to go back to the old wad column composed of a nitro card, a fiber wad or two and an overshot card. Once assembled, modern data can be used. I use 14 grains of 2400 with a 1/2 of shot.
Even the traditional fiber wads from BPI, Circle Fly, and MIdway are too small. You have to make your own.
BTW thirty grains of BP is a nice shooting load.
Pete
