The Civil War line would've shot dead Napoleon's men at 200 yards, way before Napoleon's men reached effective range. Also, Civil War rifles had a bit better rate of fire than Napoleonic muskets.
It's stupid to say 50 against 200.
So now you want to change the subject? Where did I say 'Napoleon's men'? Clearly you know you're full of shit. Massing firepower is what it was all about, and it doesn't matter what the era. It's stupid not to admit who would win.