The BC on that bullet is .612,a huge number.A 168 SMK is .462.
Incredible!
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.