As the title says the muskets sound like cannons. So far from what I can tell it has only been happening to my own units (playing as Britain) and from what I can tell at the moment it happens most with line infantry and sometimes levy infantry. I have yet to notice it effect any enemy units and in addition to that this issue has only been appearing during battles about 25 turns or so into my current campaign. If anyone knows a solution to this issue it would be appreciated if you can share it here so myself and possibly others can resolve it. Thanks.