Hang on, looking back, isn't the musket upside-down?
Yes, why ?
The original animation had the musket held in the other hand, so you'd end up waving it around while reloading. When I added this animation to my NW mod I mirrored it in openbrf, and now we get an upside down musket.
But I think I know how to fix that, I just need to find the time to do it XD