I've never dealt with Urban but, I have with Ragged Hole Barrels.What's the word on some Wilson .30 cal. barrels twisted 17-18?
Wilson themselves only sell in large quantities, and the last I heard,
only do a 10 twist in 30 cal.....I like to go right to the main source
though. I'd check on lands and grooves also. Probably just pushing
6 groove buttons.....