I don't know where your figures are coming from, but they are inaccurate.
The 325WSM can drive a 200 Accubond to 2900 or so, at max.
The 30-06 can reach 2700 with the same weight Accubond.
So that is 200 fps difference, not 450, as you stated.
Obviously, the trajectory and energy difference is not as great as you stated either.
My figures are not guesses, they are from actual chrographed results.
Regards, Eagleye.
I got the numbers and there was a 450fps diff, off ballistic charts on the net:
30-06 here:
http://www.cpcartridge.com/30-06B.htm
and the 325 here:
http://www.winchester.com/Products/rifle-ammunition/supreme/accubond-ct/Pages/S325WSMCT.aspx
I did not find one manufacturer that made both cartridges with the same nosler bullets, so I quoted the velocities I could find using the same bullets.
These are factory loads - that aside, yes, you can prob load the 30-06 a bit hotter.
My 325 handloads are 2980-3000fps, more than the 2950 stated by the factory win loads. The most accurate load from my gun was 3050fps but had slight press signs, and yes, it was over a chrony. I backed off to a load at 2980 with good accuracy and no press signs.
FYI I did also search on the reloaders nest, and most of the 30-06 loads listed there with 200gr were well under 2500fps. Most were 2300-2400fps.
Nosler reloading site lists handload data up to 2560fps for the 200gr 30-06, and 2900 with the 325. We both know (and I have seen) these can be hooped up a bit in modern rifles. But as for factory loads, I have not seen any 200gr 30-06 data faster than 2500fps.
So, that is where my data is from.