.458 Winchester Magnum Ammo

.458 Win Mag ammunition is a type of rifle ammunition designed for use in firearms chambered in .458 Winchester Magnum caliber. This cartridge was introduced in the 1950s as a powerful big-game cartridge that could be used in a bolt-action rifle.


The .458 Win Mag cartridge is a rimmed, centerfire cartridge that measures 11.63x63mm in size. It features a large, heavy bullet that typically weighs around 400 to 500 grains, making it one of the largest and most powerful rifle cartridges in common use today. The standard bullet weight for .458 Win Mag ammunition is 500 grains.

The bullet design for .458 Win Mag ammunition typically features a lead core surrounded by a copper or brass jacket. The bullet may be a soft point, full metal jacket (FMJ), or solid, depending on the intended use. Soft point bullets are typically used for hunting, as they provide greater expansion upon impact.

.458 Win Mag ammunition is loaded with a consistent powder charge and primer, ensuring reliable performance and consistent accuracy. The cartridges are typically brass-cased and boxer-primed, which makes them easy to reload.

Overall, .458 Win Mag ammunition is a powerful, highly effective ammunition that offers excellent accuracy and long-range capabilities. Its large, heavy bullet and high energy transfer make it an ideal choice for big-game hunting, while its consistent performance and reliability make it a popular choice among hunters and shooters alike.

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