This is what I'm trying to help you with Jerry. Because of the type of lube used with Eley, you can shoot other ammo over it but rarely the other way around and some other brands will send your testing right off the rails. I honestly cannot tell you exactly why but this seems established practice. That said, with all manner of switching, if it were me, I'd go right to clean metal, use rimfire blend or a dedicated solvent, not CF stuff, brush it out just like a PPC barrel and repeat that between brands and I think you will get an honest assesment of your ammo/barrel situation.