Inherited the task of cleaning a blackpowder rifle a family member didn't know what to do with. It's a percussion cap Cabela's Hawken, made in Italy, which was apparently shot about ten years ago and put away without cleaning. I broke the whole thing down and gave it as thorough a cleaning as possible, but it's in pretty bad condition- the bore is pitted badly enough that you can barely see rifling in some parts. So, what is the grossest rifle you guys have ever gotten operational? Imagine it would be pretty tough for corrosion to get bad enough to cause an actual safety concern, and it'd just be used to shoot lead round balls at ~75 yards and in. Thanks in advance!