Load data for caliber ".458 Win.Mag."The .458 Winchester Magnum is a powerful rifle cartridge designed for big game hunting in Africa and other locations where large and dangerous game is found. It was introduced in 1956 by Winchester Repeating Arms Company and has since become one of the most popular cartridges for hunting big game.
The .458 Win. Mag. uses a large cartridge case that is capable of propelling heavy bullets at high velocities, which makes it effective against large and thick-skinned game animals such as Cape buffalo, elephant, and hippopotamus. It has a reputation for reliable penetration and stopping power, making it a popular choice for professional hunters and guides.
The recoil of the .458 Win. Mag. can be significant, which makes it challenging for some shooters to handle. Proper training and practice are necessary to use it effectively and safely.
You find .458 Win.Mag. with all common powders and bullets by clicking the 'Loads in this caliber' button above.
Technical Specifications (based on the respective safety standard - see more details in tab 'Datasheet' if available)
|Bullet Diameter:||0.458 '' | 11.63 mm|
|Primer Size:||Large Rifle Magnum (LRM)|
|Max. Case Length (l3):||2.5'' | 63.5 mm|
|Max .Cartridge Length / OAL:||3.34'' | 84.84 mm|
|Maximum Standardized Pressure:||62367.2 psi | 4300 bar|
The Commission internationale permanente pour l'épreuve des armes à feu portatives ("Permanent International Commission for the Proof of Small Arms" – commonly abbreviated as C.I.P.) is an international organisation which sets standards for safety testing of firearms. (The word portatives ("portable") in the name refers to the fact the C.I.P. tests small arms almost exclusively; it is ordinarily omitted from the English translation of the name.) As of 2015, its members are the national governments of 14 countries, of which 11 are European Union member states. The C.I.P. safeguards that all firearms and ammunition sold to civilian purchasers in member states are safe for the users.
To achieve this, all such firearms are first proof tested at C.I.P. accredited Proof Houses. The same applies for cartridges; at regular intervals, cartridges are tested against the C.I.P. pressure specifications at the ammunition manufacturing plants and at C.I.P. accredited Proof Houses.
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