I'm a little dubious that .460 Weatherby is the original caliber. It would be interesting to see what W/R has to say about this rifle. Total nonsense about extending the range at which a lethal wound can be administered. With an elephant, you get as close as you can and then get a little closer. I took this one with my .458 WM double rifle and with the longest shot I ever made on an elephant (about 50 yards), and it went down and never got up again.