I could not find JB at the shop, but bought ISSO, and it easily removed the rust. I am somewhat embaressed by the other stuff that kept coming out of what I thought was a clean bore. I thought I was a meticulous cleaner, but maybe I do not know as much as I thought I did. I am wondering if those shockwaves I gave up on will load easier? Something to try at the range. As always, thanks for the responses.