Good news on the bore, I found a light I could drop down inside on a string and the rifling appears to be clear and strong all the way down. It's hard to get a picture with a bright light shining at the camera, but here is one to give you an idea of the last few inches. So my hopes are increased that this one may be a good shooter. If I have time tomorrow I am going to tackle the nipple extraction (after two days soaking in PB Blaster), and I have a .58 cal. brush, worm and a bore scraper on the way.