I am going to bet not. The factory magnum heads I tested for my 444 marlin were measuring around .555" and thus left me too sloppy for proper extraction on the 444 brass which has a rim of .514". The 460 S&W has a rim of .520" so I am betting the magnum head is still going to be too sloppy for it. I took a .473" (308 sized, or 30-06 if you are going long action) and opened the face up on the lathe to .521" and it works on the 444's rim perfectly. I am betting if you opened one up to .525-.527" it would be the ticket for you.
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