Another case in point, a movie where the skill disparity is very explicit in the shooting scenes (especially the ending): Quigley Down Under. > He starts with

Another case in point, a movie where the skill disparity is very explicit in the shooting scenes (especially the ending): Quigley Down Under. > He starts with Stormtrooper shooting skills, and ends like the Man with No Name. On the other hand, I imagine writing such a story without it seeming contrived could be rather hard. The problem with western style duels is that they often don't leave the loser with many opportunities to learn. But, on second thought, it's not as if it hasn't been done: Django Unchained is a good example for such a plot.