YES!!! the kind of replies I was hoping for. I'm not looking for more velocity per se, but MORE accuracy and , maybe, a little more barrel life? The Shilen conventionally rifled barrels I've had experience with have always 'liked it hot' - shot best at the upper end of velocities and pressures. In my mind I can see the bullet leaving the case neck, and in the the case of a fast twist barrel (1 in 7,8,or9) 'ripping' the jacket slightly as it engages the conventional rifling (because of the fast twist)
and disrupting bullet 'integrity' and , as a result, accuracy. With the Ratchet rifling or Canted rifling of the Broughton, as the bullet starts to engage the rifling the jacket isn't 'ripped' or distorted and more accuracy is the result (as if custom barrels aren't accurate to begin with!!!). Heck, maybe I'm just "jerkin the wings off of flys", but it's a thought.