Here’s the internal ballistics info for your 6.5 CreedmoorBMG in all its glory. I used 308 case info since I know that by heart. I even helped you out and loaded it to 3.34” COAL, same as 30-06 and its peers. Note the pressure. the computer isn’t even designed to work with such pressures so it’s possible that’s an overestimation of energy. And it most definitely is. Only conceivable way of pulling this off with a 6.5 CM case is to use little bits of high explosive in your powder charge, and firing it through a chamber built like a vault. Pray and hope the gun doesnt blow up in your face and take your head off.