Ruger Old Army Girl shoots 20 gauge brass cartridges @ 50 yards that are loaded with 120 grains of Graf's 2F black powder and a .60 caliber patched round ball. This 2nd video shows that since brass shotshells are so easy to load with patched round balls, who needs an expensive big bore muzzle loader. After this video, she increased the powder charge from 60 to 120 grains and switched the powder.
I load 85 grains of pyrodex rs and a .60 patched round ball in brass shells, and it's pretty good out to 30 yards with just a bead sight. 120 grains of APP would be pretty stout in a 20 gauge.
Duelist1954 made some videos about reloading plastic shotshells including without using any special tools or equipment.--->>> https://www.thehighroad.org/index.p...-shotshells-without-a-reloading-press.594408/ One main difference is that the plastic shotshells won't last very long, perhaps only 2 or 3 times according to a trap shooter that I met. Another is that the Magtech brass shotshells use large pistol primers while the plastic shotshells use 209 primers.