Good report Dave. From what I've been reading lately there are more than a few shooters who have had accuracy issues with APP.
Being pretty new to PRB shooting (used to use only the prelubed patches by Ox Yoke years ago) I am on another learning curve. So far I've only used bore butter and Olive Oil as patch lubes. Both of these have worked very well but it looks like mink oil may deserve a try. As well as Liquid Wrench.