Sir Jerry has a tip for swiftshot.
Got a shot-out Ruger RSM ?
This is a lot better than rebarreling to .458 Lott: Rebore to .505 Gibbs:

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I am guessing that .416 Rigby of Sir Jerry was a Gen-2 with 24"-long, "heavy" barrel
having muzzle diameter under the front sight band of 0.810", same as my late 1990's .416 Rigby.
Perfect barrel profile for a .505 Gibbs.
Since he shot "thousands" of 400-grainers at 2700 fps to erode the throat,
he gets a gold star for putting the integral quarter rib to further use, instead of scrapping it like swiftshot !
I would love to find a .375 H&H Gen-3 RSM with the 23"-long, 0.750" muzzle diameter, factory barrel
and have it rebored for a .458 WM+ with integral quarter rib !

Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.