Given that I had been three grains underneath max load I felt Risk-free enough not to work up. There was also a write-up by German Salazar that confirmed images of primers in action, showing the WINLR for being hotter in comparison to the F210. That gave me some self confidence https://winchesterprimerseurope95939.liberty-blog.com/31942574/the-smart-trick-of-federal-215-large-magnum-primers-that-nobody-is-discussing