How to load ammunition for medieval artillery, what are the detailed steps ah

First the chamber was cleaned using a bore brush, then powder was poured into the chamber and compacted with a loading pestle. The wooden feeder (the wooden spacer between the shell and the powder) was then pushed into the chamber with the mortar and pestle and then loaded with shrapnel or spherical shells. The priming powder is then poured or a letter tube inserted at the cannon's fire door, and then ignited with kindling. The elevation of the cannon is adjusted by means of a wooden wedge. Orientation, on the other hand, was to be adjusted by moving the cannon frame. If the cannon and shells are cast at a high level, it is also possible to load spherical shells directly without wooden feeders. However, the shotgun shells must be padded with wooden feeders, or the range is not far.