Some of Boyds' profiles aren't as well suited to heavy barrel profiles as others. I think they specifically mention the Classic, Prairie Hunter, and Featherweight Thumbhole will end up with very thin wood on the sides of the forend. The Platinum, Heritage, and Pro Varmint don't have the finger grooves on the forend, and should work better for heavy barrels. I have a Pro Varmint on an Axis with a 1" bull barrel, and there's still a good amount of real estate between the widened barrel channel and the edge over the entire length.