Mike at Hell's Canyon makes a great barrel but they are NOT light! I have a 28" MTU contour blank and it weighs in at 62 ounces. He uses Benchmark barrels for the core. You could ask Benchmark for an extra inch to be added to the shank to give you the added material needed and they probably have an 8 twist option. I'd give them a call first before contacting Mike if you want to go that route. Just be prepared to wait around 4-6 months for it to show up at your door.