None of the bullets I listed above was kept under 2700. Only exception might be the 257 caliber, as it was not checked over chrono.
But I am not a Weatherby type of guy....
Now that you bring up the 257 caliber, I've found it quite interesting the 100gr 257 Hornady hold up remarkably well at weatherby velocities (it kills like no other caliber I've ever experienced), unlike the 180gr Interlock which really gets stressed at 300 Weatherby speeds (in my experience anyway)