I'm not a gunwriter, but these are my thoughts. I hunted exclusively with a 30-06 from 1974 until about 10 years ago when I decided to buy a Kimber and 308 seemed a better option than 30-06 in a rifle that weight. I've since added 2 more 308's and the 30-06 has only been hunted one time since. That was 7 years ago and I don't see any reason to go back. The Kimber is right at 6 lbs scoped and recoil is on par with a 7.5 lb 30-06. Or my 7.5 lb 308 has about 25% less recoil than either the 30-06 or the 6 lb 308.
The better current 308 loads beat 30-06 loads from the 1950's by at least 100 fps. Of course modern 30-06 will always be 100-150 fps faster than 308 with the same bullet weights. I figure the 30-06 gives me another 75-100 yards of effective range before bullet impact speeds are too slow for adequate expansion. But the 308 still does that at ranges farther than I have the skills to shoot. I'll never hunt anything too big for either of them, and if the 308 ain't big enough to get the job done 30-06 ain't enough bigger to matter.
I don't think there is any mechanical accuracy advantage. But I shoot my standard weight 308 rifles better than my 30-06b rifles.
It may seem that I'm knocking 30-06. That isn't my intent, I really can't say anything negative about the round. It served me well for a very long time. But at this point in my life I just like the 308 a little better.
