I like the .458s but i would avoid the Barnes 300gr Triple Shock (with the small hp) and the 300gr Original at sub speeds. They work ok in a hot Savage load but need more fps than subs can provide for reliable expansion. The 300gr SOCOM or the 300gr TSX FN with the big hollow point do fine at 45/70 and ML speeds.

Ive shot many Barnes Originals and the high BC is worthless up close and once it is of value, the speed has fallen well below what it needs to expand. If you can achieve atleast 2100fps MV things change a bit but its still a very tough bullet.