I’m looking at my Lyman 47th Reloading Handbook, and don’t find your specs for anything there, but with 140gr .264 Win Mag, IMR-4350 ~55gr the muzzle would be abt 3000 fps. A .30-06 165 jacketed SPBT with the same load would give abt 2700 fps muzzle. So it sez, that is. Been a long time since I reloaded the .30-06. They don’t like you to shoot a rifle in Delaware, except in restricted circumstances.
Check the Berger and Sierra web pages for BC numbers.