.410 Brass shotshell reloading?

[Rrusse11]

Plink et al.,
Here's what I do for 410.
444 Marlin brass,LR primer, standard 410 plastic shotcup, the Claybuster #CB 1050-41A is the cheapest.
Currently throwing 16gr of Alliant 410 into a case, insert shotcup with a pencil, fill to rim with shot of ur choice, I'm using #9 or #8 1/2. 7/16" cardboard wad cut with a cheapo chinese wadcutter set.
Using the powder thru expander die on my Lee 444 Marlin die set, adjust to press corrugated cardboard wad ~.1" below rim.
Crimp with Lee Factory Crimp Die which rolls the edge of the case enough to contain the slightly oversize overshot cardboard wad.
Fire away!
Cases don't need resizing, and the 444 Marlin is a tad undersized, but expands up to fit the chamber over a half dozen fireings or so. I've only ever partially resized if they start getting a touch tight in chambering.
I decap with a manual pin and base set up, reprime with the Lee handheld prime unit.
Works in 3 different 410 shotguns I've got.

I did get some of the Magtech brass, and have used the same general technique to reload same, a lil more shot/powder capacity than the 444 case. The Lee FCD needs a spacer to get the crimp in the right place, but that's no more than a fat washer on the shell holder so that the collet squeezes the 410 case mouth.

Cheers,
R*2