The Lee Load All,is a shotgun shell reloader not a metallic cartridge reloader.
The amount of powder charged,is by a bushing installed into the charging bar.
I had one of these as a teenager,and wore the thing out. It worked OK,as I can remember.
Mec,makes a much better shot shell reloader,but if you are just starting out reloading,or don't shoot all that much the Lee will work just fine.I never weighed a powder charge from the Lee Load All when I had it,but every shell I ever loaded,shot just fine.