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458 SOCOM

458_SOCOM

Designed in 2000, for use in the AR-15 platform, the 458 Special Operations Community (SOCOM) has only one advantage over the more compact 450 Bushmaster, it uses conventional 45-caliber rifle bullets (0.458-inch), compared to 45-caliber pistol bullets (0.452-inch).

Because the former are available in a much wider variety, it is easier for ammunition manufacturers and handloaders to develop loads for the 458 SOCOM with bullets of various weights and designs, especially bullets heavier than about 300 grains, which is about the heaviest 45-caliber pistol bullet commonly loaded.

Owing to the added bolt thrust of the larger-diameter case, when compared to the 450 Bushmaster, the 458 SOCOM must be loaded at lower pressure and therefore cannot achieve greater energy when launching bullets of similar mass.

 


 

In common with the Bushmaster, this round works with standard AR magazines but use of a different follower and other modifications results in easier loading and more consistent feeding.

With sub-sonic loads launching a 600-grain bullet, the 458 SOCOM has impressive fight-stopping performance for a suppressed cartridge.


The text associated with the cartridge description reflects opinions and conclusions of the author, M.L. (Mic) McPherson. Lee Precision and its employees do not necessarily either agree or disagree with any of his comments. We present these with due deference to his recognized expertise in the firearms field. His acumen extends to handloading and all aspects of ballistics - internal, external, and terminal.
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