So it turns out my carbon hunter has asporter contour in it. My carbon fiber barrel is in a different rifle (1st world problems amirite?). However I am starting a build today with a Howa heavy barrel 300 prc so I dropped it in the carbon hunter so you can get an idea. You are gonna have to open...
He says its a fix for long action. 6.5 prc doesn't have any magazines at the 3.715. Hawkins has solutions for remington 700 models and clones but any other platform and you are kinda SOL. I am building a howa 1500 long action and hopefully this solves my issue.