Hey guys, I accidently stumbled on a used TC 50 cal Hawken percussion rifle for a unreal price under $350. Rifle is in excellent condition externally and looked like it was very well cared for. It was not a kit but a manufactured rifle with a 125,000s era serial number. The place I got it didn't have the equipment to further inspect it but they offered me to buy and it bring it back if my inspection didn’t like what I saw. I took some pics with my borescope and was looking for another set of eyes and opinions about said rifle. I'm still fairly new to muzzleloading so any help appreciated. That last picture is the port to the nipple from inside the barrel. Is that rust or something else?