The issue with the C-ring cut was one of gas control. You lose that with the double broaching. The thumb cut was great for military use ( fast loading of sporters also ) but brought about the need for the guide on the bolt. It would also allow gas to divert. The flange on the bolt shroud was supposed to deflect the final bit of any gas from case rupture.
All fine points of German design.
Hot loads weren't considered. Early smokeless and tropical temperatures were.
While a Remington 700 handles gas better than any bolt action, it wouldn't survive a week on the battlefield.
Deflecting gas?
Look at a High Wall, Ruger 1, or even an Encore.....
