Wow, sure is a lot of methods for case prep! The imperial sizing wax is certainly popular also. I will too have to come up with what works for me. I was not aware of the case stretching from the inside ball. Makes sense. I'll start with the one shot and see how it goes. So what would be a good powder to start out with? I use W231 in all my pistol stuff. Don't know about 223 though. I am shooting a 55 grain bullet out of my AR15. Thanks!