ACW saw many new things , percussian cap ( more reliable than flintlock), rifled musket that used the "mini"ball, they loaded as fast as a musket but had the range and accuracy of a rifle
thats for sure,,and remmeber the black powdr centerfire rifles made today,,are the most accurate firearms in the world,,knight arms makes a centerfire blackpower gun that is illegal to hunt with in some states because of its accuracy,,black powder burns so evenly over the bullet compared to a cartrage,, more accurate close and long range
acw was ugly just like any war,,,and ranks up with the bloodest fighting in history,,and did send war into another era,, first hand granads were produced in civil war,,and the first ship sunk by a submarine too,,and first battle wagons to fight too,,days of ship to ship fighting would never be the same,,i dont think there is one battle in the civil war that didnt cause mass deaths,,battle of the wilderness was bad,,same with little known battles like wilson creek