At that time, the cartridge case was pressed out manually, a bit like pressing a soda bottle cap. It was made of copper, which has better stretchability. }, to make a complete bullet, you need to use about 3 such simple manual instruments. The fastest I can do is 50 in an hour.
{Install the mold (die), perform decap, sizing, priming, bullet seating, etc.}
Every Each step is simple and a manual tool is very crude.