And, interestingly enough, Selby's Model 70 .458 is the push-feed model.

One of Finn Aagaard's two .458's was also a push-feed Model 70. The other was on a Mauser action--but he mostly used his pre-64 Model 70 .375 H&H. The .458's were mostly for backing up elephant hunters.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck