Awsome barrels , good customer service. If you have any questions you call and talk to the guy thats making it , which I'm sure is the case with a few other companies.
The one I had , shot great cleaned very easly and hardly fouled at all.
I have not used any 30 cal barrels from Rock Creek but I can say they bent over backwards to design a 7mm barrel specifically for my 7mm Allen Magnum and the 200 gr ULD RBBT.
The willingness of them to get me a product for my special needs was impressive and I will be using many more of their barrels.
I have delt mainly with James at Rock Creek but everytime he has been very good to work with and more then willing to try anything needed to get a barrel design to give me what I want.