.458 SOCOM

11.63×40mm or .458 SOCOM, designed bu SBR, is one of the rounds designed to counter certain wealnesses of 5.56mm cartridge. However, unlike general-purpose 6.8mm SPC or 6.5mm Grendel, .458 SOCOM is more specialized round, trading reach for maximal punch. One serious drawback is that .458 SOCOM effectively turning 5.56 magazines into single-stack ones, decreasing capacity.

Ammunition types

 * SBR AP: 350-grain tungsten core armor penetrator.
 * SBR CQB-100: Lightweight 100-grain aluminum-core round for close combat.
 * SBR HV-SLAP: Saboted hi-velocity tungsten penetrator.
 * SBR IS: "Incendiary-spotter" military-grade explosive round.
 * SBR JSP-410: Heavy 410-grain softpoint round.
 * SBR JSP-500: Ultraheavy 500-grain softpoint round.
 * SBR JSP-500 SUB: Subsonic loading of 500-grain softpoint round.
 * SBR SB-255 Match: Solid brass 255-grain round, offering a good balance between external and terminal ballistics.
 * SBR SB-255M Match: Variation of SB-255 with moly coating.
 * SBR SB-300: Solid brass 300-grain round.
 * SBR SintWU SUB: Subsonic frangible round made out of sintered tungsten.
 * Speer AGS500 AP: 500-grain tungsten core Grand Slam big game round.
 * Speer AGS600 AP: 600-grain tungsten core Grand Slam bigger game round.
 * Lehigh CF SUB: 570-grain Controlled Fracturing subsonic load delivering maximum terminal performance.
 * Lehigh MMI Multiplex: Six-projectile multiplex load by Lehigh Defense.
 * DSG XMP: Ultraheavy subsonic tungsten-core AP load.