Actually 2800 is normal in the 280 if you load it to capacity. SAAMI specs are more attributed to the semi auto Remington it was introduced in. If you push it to the pressure limits of a 270, 58,000 increased to 61,000 psi that is.
The 7mm-08 in a 24" barrel comes in at just under 2800, more like 2750. The 280 Win in factory loads are not really different than 7mm-08 given the same length barrel. But at the higher pressure they will run around 2900 fps with a 150 grain.
7x57 simply falls in between.
