Vortex just posted a video testing 6.5cm and plus peak, and they are using Tikka’s. Appears to be running just fine and the numbers are phenomenal https://youtu.be/SJ_z3lgjW74?is=NuDK11i4fnCWOrwk
I’m not actually familiar with shell shock. I’ll check it out.
Shell shock is currently under trials with the us military as an option to replace their brass 308 and 556 cartridges to further extend the life of those cartridges