Rememington 700 xtr 308 come in 1:12. Other 700 308s 1:10. Which leads me to believe twist are purpose designed. Which is why I started this thread, curious what 1;11 is designed for.
Looking at berger's reference guide, 165-180.
Does it make enough of a difference,dunno. But not like sakos are cheap guns, and just building whatever for a cheap price. Also they have a reputation for factory accuracy.
Since the mass population does not hunt with 30-06 over 180 grain, I suspect they tried get more accuracy and build for lighter bullet. Maybe limiting what you can use.
But if companies just make one barrel and then put it on various 30 cal rifles, how do you explain 700s with different twist in 308? I really doubt people are shooting 200s in 308.