The only black powder loading for a 2" .410, that I know calls for 3/8 oz of shot with 25 grains of black powder (slightly less than 1 dram).
This would be same loading as the 44XL. Only so much can be crammed into 2"
You just might get 7/16 oz into the shell. Depends on your wad.
Shot sizes were 6, 7 1/2 or 8.
Early on, Eley did produce a 7/8" long .410 according to Gabriel. It is surmised that it was used in self defense pocket guns and possibly cane guns.
Eley also produced a 2" .410 pinfire as did a French maker whose name eludes me at the moment. Eley's 2" 410 was called Fourten, their 2 1/2" was Fourlong.
Pete
