Regarding copper fouling. I cleaned my 6.5 for the first time yesterday after about 100 rounds. It was still shooting great but I was cleaning the others so thought I'd go ahead. I found zero copper fouling in the barrel. The last 25 rounds were the ELD-X. The previous were Precision Ballistics that use the Berger jacket. The 6 Creed had nearly 600 rounds having only Bergers shot through it. One patch came out blue and the rest were clear. I guess what I'm saying is that I haven't seen much difference in the Bergers and ELD-X as far as copper fouling although 25 rounds isn't much of a sample size.