If you need a rifled barrel to hit your target, you're just a bad shot. Back in my day, we used to shoot cans with our smoothbores from five miles away, in the snow, up a hill, and with 69mph side winds.
Smoothbores? You had it easy. With our 180-degree roughbores we had to be extremely good at dodging to not kill ourselves every time we used them. Now those weapons sorted the men out from the boys.