I shoot 16 grain in my .36 Patriot and it works quite well for that gun. I have a Derringer style "nick named the noisy cricket" that likes 12 grains. so depending on your gun that should give you a starting place.
Follow the recommendations in the owner's manual.
Depends on the caliber. A .45 caliber pistol uses about 40 grains of black powder. Contact the maker's website and download the owner's manual for YOUR gun.
Chances are that if you overload the charge in a revolver style black powder pistol, you can blow up the cylinder or blow the barrel off the end of the gun.
The baking powder makes any food you bake rise. How much it rises depends on how much powder you put in and how hot your oven is when you put the food in. For best results a sudden burst of heat is needed.
Add more water.
8 cups
yes you should use baking powder in scones because that makes the scones rise when they bake.
holsters
It depends on what you want to do with it. You should consult a reloading guide.
it is a powder which you use to put on your cheeks
Baking Powder
nO you can't put baby powder on broken skin