Hi all, I just picked up a Miroku 1863 rifled musket on Gunbroker. Checking out the barrel, it seems the rifling cutter they used was extremely dull. It plowed up nasty burrs on the corner of each land, and through the borescope you can see the grain structure of where the steel has been "smashed" there rather than cut. So I have a barrel that is supposed to have a bore diameter of .580" and a .570" pin won't pass through it. I would think ideally I want a spiral flute reamer to run through there, then maybe hand lap or fire lap from there. Except I can't find a source of spiral flute reamers the right size. I can put sand paper on a really long stick and go at it that way, which might work. I haven't tried removing the breech plug so I can go all the way through, not sure if that is a good idea or not with this barrel. I guess I could have it relined, but that costs more than I paid for the whole thing. Besides, it's more fun to fix stuff yourself. Anybody have any good suggestions?