There are two kinds of brass hulls. Drawn brass hulls, Magtech, CBC, Bell Extrusion, use traditional wads of approximately one gauge larger. For best results, the wad column should be compressed with about 40 lbs. pressure (an old bathroom scale and dowel will do). These are primed with large pistol primers.'
Lathe turned brass hulls are very durable, very strong, and very expensive. Worth every penny. They are made by Rocky Mt. Cartridge Co and use regular shotshell components.
I seal mine with an overshot card and Duco cement.
"Only hunting and mountain climbing are sports. The rest are just games." - R.Ruark
NRA Life Member