Well, patience has never been my strong point. So last night I decided since I hadnt really explored the idea of it being carbon, I soaked a patch in solvent and pushed it into the chamber tight and went to bed. Woke up this morning and cleaned chamber with a mop, nothing appeared overly dirty. Sharpied a piece of brass to see where it was rubbing, and it chambered no issues..... So I tried one of the live rounds I had previously tried, chambered just fine. So what it was, I'm not entirely sure and am left very very puzzled. For safety I'm going to wait until the borescope arrives just to be sure everything looks good inside. Thank you all for your input!! Also I am from southern ND