muskets were horribly inaccurate down to 100 yards anyways. The black smoke blocked the view after the first volley so aiming was out of the question..not to mention recoil.
Those two sentences are far less accurate than a musket at 100yards.
For starters, black-powder firearms do not produce black smoke. Recoil isn't bad either, compared to modern center-fire rifles.
I have a .75 Brown Bess musket, accurate to the year 1762. Flintlock, with an atrociously slow lock, and firing hand-cast lead balls. It easily shoots a 4" group at 75 yards. Hitting a paper plate at 100 yards isn't that rough. It's a fine gun for deer out to 75 yards. Still deadly beyond that, but I'm not comfortable shooting further with it.
Loaded with shot, I've used it for several turkeys, ducks, pheasants, geese, rabbits and squirrels.
That gun is far less accurate than my flintlock rifle, which is also accurate for the Lewis and Clark time-period.