I have '73 musket in 44.40 made around WW1.
I've used in a few matches without issues.
It's fun, it's cool, and yes it can be unwieldy.
I do not know the tube capacity, nor do I have a bayonet for it.
As for the weight, it doesn't seem to be much heavier than my Uberti 66 with a 24" barrel.