What about Barnes X, that is not a 45-70 type bullet, and comes in 400 gr...there are others who make a 400 soft or solid besides Northfork...

I know the SD is way different in 416 and 458 both with 400 gr bullets, but I mean really, how dead do you have to kill them...I can see a 400 gr 458 at 2300 doing a job on most anything given the correct bullet for the job (soft/solid)...

I just think the 458 Win has gotten better as bullet technology and powder technology have improved...you do not have to settle for a 500 @ 1920fps anymore..