Rust and pitting in barrel

[Jppard]

I've pick up a 69 cal Nathan Starr 69 cal musket. I need to clean out the rusted pitted barrel. I'm going to us it for living history and reenacting. It doesn't have to be perfect but good enough to clean with a jag without it getting stuck at the breech. Any suggestions?

Jppard

 

[Roy]

wire brush and naval jelly to start. That'll remove the rust, and it depends on how deep the pitting is if you can get away using a jag or not to clean with.