I own a E.A. Brown custom barrel. It is a stainless barrel. The caliber is 6.5 US, it is a necked down and trimmed 30-30 case. I have a 2-6x Elite 3200. It is the most accurate barrel I own.
With a nosler 120 gr. Balastic tip I get the same speed as the famous 6.5 JDJ. You can get 7 us brass and neck it down. One more thing it is also the best looking barrel I have seen.