Yes, 450 Grain Bullets for the 458 Winni is that what makes me real hot for this cartridge. Easy brass, easy reloading and equipment, normal sized action, easy recoil, handable rIfle weight and so on. In combination with 350 grainers for plainsgame, the good old .458 is versatile like rubber boots in great britain.
The biggest enemy of that .458 was the introduction with 500 grainers trying to copy or even beat the 450NE and 470 NE.
For that 500 grain bullets (leadfree bullets even need more space) the 458 Win shell is in my opinion toooo short.
I think thats why the Lott came up and did it right !!