Gotcha, I forgot they worked over the action making it lighter...

The .270 is 65,000 psi and the .308 is 62,000, which are offered. But, the 7 rem mag is 61,000 psi. So, based on pressure alone, but I guess the barrel diameter also factors into that cause the 7mm is a bigger diameter cartridge...

Am interested in gunsmiths/engineers who know how to calculate these things...