I will add my two cents here. I routinely shoot black powder skeet as well as low pressure smokeless in my 1890's hammer gun.
I load equal volumes of shot and 2F black powder. That is about 70 grains of powder for a 1 1/8 oz of shot or slightly less for 1 oz loads. I use 2F because I buy it in volume for my muzzle loader.
I use plastic or paper hulls, both either melt or burn though in 2 or 3 reloads. Since many of the shooters at the club dump their hull, finding empties is not a problem.
I use hard 1/8" hards card (nitro) and 1/2" cushion wads. I add card wads as needed to raise the shot level and crimp like a regular shell.
I have used some of the Black Powder subs but stay away from Triple 7 because it generally too expensive locally and operates at higher pressures.
I do not use a shot sleeve with Black Power, since the bore has to be scrubbed anyway a tornado brush does fine. Some of the newer shot sleeves will work at Black Powder temperatures other will melt.
Loading is not chitical, I use a dipper for powder and shot, I set the wads and crimp with an old Mec reloader.
For thin wall brass shells I use 11 ga components.
Black Power is a lot of fun and draws a lot of attention at the club. Kids really like the smoke and stink.
Good luck
RPr
