RE: inherent accuracy
I understand what you are asking.
I do believe in this inherent accuracy. I do believe that short actions can be more accurate than long actions. It is hard to make a 308 shoot bad in my opinion. After chonying several calibers, it is hard to get a Spread below 50fps with a 300RUM, but very easy for a 308.
Sure, several people out there gets their 30-06 to shoot the eye out of a squirrel at 100 yards. But take that bad boy out to 600 yards or even further. That velocity spread can catch up with you.