The sweet spot for a .308 case is .338 caliber
The sweet spot for the .30-06 case is .35 caliber
If you are going for a short action, go .338 aka .338 Federal
Better SD, more energy, 3k plus ft lbs
.35 Whalen same thing with 3.5 k plus ft lbs
.358 less gun than .338 Federal
This is what I would consider.