Criticism
There has been some criticism of the cartridge for its inability to reach the so-called magical 2,300–2,400 ft/s (700–730 m/s) velocity (with some powders) some hunters believe is required for maximum penetration on dangerous game, the end result is that no scientific proof has been made on this subject, and it is likely accepted because of the older bullets that will not retain their weight at high velocity. This is a particular concern outside North America where only particular lines of cartridge powders are available, sometimes of local manufacture. While the Lott achieves this velocity, the powders used may not be available in most locales.
This is particularly true in many African nations. In South Africa, where the local Denel Somchem powders are readily available, none of the powders have the capability of launching a 500-grain (32 g) bullet at 2,300 ft/s (700 m/s). This led to the creation of a new cartridge named the .458 Express by its designer Dr. Koos Badenhorst. The new design uses a 3-inch (76 mm) cartridge made from basic .458 brass based on the .375 H&H Magnum casehead. This case provided the capacity necessary using Somchem powders such as S321 and S335 to drive the 500-grain (32 g) to 2,300 ft/s (700 m/s).
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