Which is evidence of why the repeating weapons of Spencer and the few Henry rifles had so much impact on the end of the US Civil War. Most of the damage to the enemy occurred when the enemy was between 150 and 25 yards away. It was the rate of fire, not accuracy that matter during the seconds that the enemy was within that distance that mattered. This was probably especially true as the battlefield filled with smoke.
If
@thomas aagaard is correct, it could explain why early in the war great masses of infantry could stand and shoot at each other with the result being only incidental casualties. By the middle of 1863 that was not the case. The soldiers had better weapons and were more adept at using them.