My 308 loads come from the Sierra and Barnes Manuals. I took the top velocity load from each. Like I said, I don't shoot factory loads so I can't really compare them. I will have to check the Federal catalog and see how it compares to the chronographed loads from my Manuals. One other thing I would have to add is that I would have to chronograph the Fedeeral loads as well because seldom do factory loads produce their advertised velocities in standard rifles as they often use longer pressure barrels to come up with their stats. Anyway the comparison listed above on the 338-06 and 30-06 would hold very close to those of the 308 and 338 Federal. I can only be sure when I start working with the 338 Federal.