Martin,

Unfortunately articles on the site definitely imply that a .45-70 is superior to a .458.

Quoting from Modern .45-70 Performance "...the 45-70 provides a degree of lethality not generally found with other calibers, even ones producing much greater power. This is best evidenced by comparisons with the mighty 458 Winchester Magnum."

If it were correct in actual practice, it would be a very simple business decision for professional hunters who have seen the results in the field to to rearm themselves with .45-70 Marlins and save a lot of money. They aren't doing that.

Richard.