I have an old Oviedo Mauser action that has been Bubba'ed up. Rebarreled with a .300 Savage barrel that was then rechambered to .308, it was free...

I've debated building it into .257 Bob or 6.5 Swede. I have very little loading experience, but it seems like 6.5 Swede could be made to at least equal if not surpass 6.5 Creed. I may be stumbling across common knowledge or maybe I'm missing something, but thought I'd ask.