For what it is worth I attached a couple of photos of a CZ-550 .404 with a factory bolt and an AHR modified bolt. I really like the feel of the bolt handle with this mod but I do not know how much it would help with your knuckle busting problem unless the angle were changed more and then some stock removed. I have the same model Trijicon NIB that I have yet to mount on anything but this thread did get me thinking. The Trijicon power adjustment ring protrudes farther than the Swarovski Z6,Z8, or S&B Exos and has a much sharper edge.
