Home Forums Hunting & Shooting Express Rifles and Big Bores Only The great 458 Winchester. Everyone should own one at least once

We can do a lot of consideration there for sure,
assuming you mean in turning an 8x57mm Mauser M98 box into a .404 Jeffery
or .458 Lott (ugh) box.
W. J. Jeffery obviously attended to theirs.
Heym may be making their mag boxes cartridge specific, even for their .505 Gibbs,
but most "factory rifles" make do with less than perfect "geometry."

The Pre-'64 Winchester M70 in .375 H&H got a 4+1 fit perfected, like a glove.
Like OJ's gloves fit him before they shrank with the drying of the blood soaking them.