Since the revolver was no longer a secret weapon, it was imperative for Tang Mo to make himself a true "Left-Wheel Handgun".
In fact, he had already accumulated some smokeless powder and had several apprentices help him use the steam engine to stamp out some copper bullet casings. With the steam engine, stamping became very simple, especially stamping the soft metal, copper.
Using the time squeezed from his busy schedule, he handcrafted some metal fixed ammunition in his own laboratory — bullets specifically designed for the use in the Left-Wheel Handgun!
This might have been the first batch of true metal fixed ammunition in the world, complete with primers and made of copper, closely resembling the appearance of modern bullets.
Tang Mo always had the habit of keeping an ace up his sleeve. Since he had already revealed the revolver, producing another secret weapon was only natural.