Had the very same prob. with BB...........d0 as .243 w/ the soap routine, super hot followup and immediate lube prior to storage......I've also discovered that I prefer Ballistol to CLP.
Nearly lost a really nice .54 bbl to the chicken grease routine...........my take is that the advertising analogy of 'seasoning' a bbl similar to an iron frying pan is utter BS......I wound up having to lap that .54 to restore it after TC's product.