Scandinavia and the World

Comments #9828735:

I know gun-fu 23 2, 1:59pm

It's not shooting a muzzle-loading gun that's difficult, since they were inaccurate enough that most of the time the only real way to hit anything was to line up a bunch of troops, have them all point in roughly the same direction, and fire as a group.

The real difficulty was training the soldiers on how to reload in a timely manner. And also how to properly keep the gun in working condition.