Yep - the reload process of any firearm at that point in time (powder, wad, bullet) was time-consuming enough that at close range you'd fire off your weapon and then switch to melee. From my own experience playing stuff like Pirates, Vikings and Knights or Holdfast, you only get one shot, so do not miss your chance to blow. That opportunity might come only once in a lifetime... before you're hacked to death and end up on the respawn screen.

Muskets tended to be used in mass formations, often with one rank firing while the other reloaded.