Here is a safe and easy way to load your cannon. It's great for inclement weather conditions. From the chart below, determine how much powder you will need. Using a powder measurer, measure that amount.
Aluminum measuring spoons work well.
Fold the tin foil to create a pellet that will easily slide down the barrel. When you know how much foil to use, you can make up several powder packets that are easy to field load and are weather tight. Insert the foil powder load into the muzzle and push to the end of the barrel using a wooden dowel or ram rod. Using a brass rod or a skewer stick , insert it into the fuse hole to pierce the foil packet. Move it around a little to increase the opening in the foil pouch.