The cast bullets are good but if you want to shoot jacketed
bullets here are some I recomend.
Barns "Original" in 300 and 400gr Semi Spitzer and
The Speer 400gr flat nose or the 350gr hotcore
( It has a very small flat nose).
The 350gr hot core would be my choice for Elk and
Buffalo and they can be loaded to around 2100 ft/sec
(In modern rifles)and 2300 in the Browning and Ruger
and over 3000ft/lbs energy at the muzzel, 2000ft/lbs
at 300 yards and 1500 ft/lbs at 500 yards .
Plenty for Elk size game.
The other .458 bullets ar made for the higher velocity
rounds like the 458 Winchester and the 460 Weatherby.
Some bullets will say 45/70 .458 dia on the box and these
are for 45/70 only.(The jackets are two thin for the modern
cartriges like the 458 Win and will shed the jackets when
leaving the barrel) at high velocity.
I Hope This Helps
J E CUSTOM