Small detail here:

The invention of the Mine' ball shortly before the U.S. Civil War made reloading a rifle just as fast as reloading a musket. It was before that invention that rifled bullets had to be literally hammered down the barrel with a metal ramrod, making them slow to reload. Riflemen in the 18th century and early 19th would often load a rifle round and then switch to smooth musketballs after the initial volley. The Mine' ball had an expandable base. It slipped down the barrel as easily as a musketball. When the gun fired, the base expanded and the lead "bit" into the rifling in the barrel, giving a tight fit and the rifling effect.

Anyway, back to MTW2.