How much gun powder does a Civil War cannon use?

This can be on average, or per shot. But how much gun powder does a Civil War cannon use?How much gun powder does a Civil War cannon use?
that depends on which cannon... And what shot they are using.How much gun powder does a Civil War cannon use?
Not very much lately
What type of cannon, shot, bore, etc?
They could use as much as they wanted depending on the distance, and the weight of the cannon-ball. Re-loading was about three minutes. How they judged the elevation is beyound me. The area of destruction was minor to say the least...