27 grs of FFF Blackpowder.
A typical starting load for the ball and cap Leinad pistol would be about 15 grains of fffG powder.
How much is a old black powder only 45 cal long barrel pistol worth?
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.
Follow the recommendations in the owner's manual.
First, find a copy of the owner's manual for YOUR pistol. Second, use ONLY black powder, or a modern black powder substitute, such as Pyrodex. The ROUGH rule of thumb is one half the bore diameter in grains of powder. A .32 cal would use ABOUT 12-16 grains of powder.
40 grains of fffG
10-100 usd
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.
Assuming you have a single shot ball and cap black powder pistol, anywhere from $50 to $100. These are modern manufacture reproductions, and relatively cheap.
twice the caliper plus 2 or 67 max
fill it all the way up get 1000 fps no worry about blowing up
150 to 2500 dollars all depends on what kind of weapon you want.