The numbers I posted for the 225gr ELD Match in a 300 Remington Ultra Magnum Cartridge are based on actual data that the bullet manufacturer
( Hornady ) obtained from Doppler Radar readings . Not some made up hypothetical numbers with no basis.
Reference ... Hornady Reloading Data Manual ... 10th edition.
Hell the 338 285gr eld-m with a bc of .829 will out shoot the rum, granted anything 338 mag going beat you up pretty good probably less than that rum