Not sure this will help you much but here are my favorite long range hunting bullets:
156 gr ULD RBBT Wildcat BC 0.820
169.5 gr ULD RBBT Wildcat BC 0.750
300 gr ULD RBBT Wildcat BC 0.810
If you want more information on these bullets contact Richard Graves at firstname.lastname@example.org
By the way, only the 300 gr 338 bullet will work in a standard factory twist. I load my 257 Allen Mag and 270 Allen Mag with the other two bullets to 3365 fps and 3400 fps respectively.