Today, we are the leading manufacturer of factory loaded 458 SOCOM with over 22 different loads available. Southern Ballistic Research, LLC (SBR) developed the first factory loaded ammunition for the 458 SOCOM when it was initially designed. Whereas the heaver 600-grain bullets generate 1326 foot-pounds. Using lighter bullets in the 250-300 grain weights generates a muzzle energy of around 2565 foot-pounds of energy. Shooting with various muzzle brakes and sound suppressors make the round almost pleasant to shoot. It has become a popular plinking and target shooting round among its adherents.ĭespite its intent and design, the 458 SOCOM has not been adopted by any military forces in an official capacity.įelt recoil of the 458 SOCOM round is stout but not unbearable. Most shooters working with the 458 SOCOM round report great accuracy with the cartridge. Different loads and different bullets make for a very diverse range of uses in the AR platform from barrier blind, dangerous large game control, or vehicle disbablement. Likewise, an M4 carbine in the hands of a law enforcement officer would make for an excellent patrol rifle or carbine within its effective range. He wanted a capable self-defense round for the military to work reliably within 200 yards to stop an enemy soldier with one shot. After all, this was the reason that Marty ter Weeme of Teppo Jutsu developed this round. A suppressed 458 SOCOM with a short barrel could make for the ultimate home defense or ranch defense weapon. Some deer hunters have reported great success with the extra heavy bullets at subsonic speeds performing extremely well on deer at 250 yards.Īs it performs well on medium to large game animals, it should offer similar performance against two-legged predators. Most hog hunters consistently boast about one shot stops with the 458 SOCOM round. The round offers excellent energy and penetration with a heavy. Hunters have successfully and consistently taken bears, boars and deer with this round at ranges inside of 250 yards. A handful of smaller companies are building bolt-action rifles and lever-action rifles in this caliber.Ĥ58 SOCOM excels as a hunting round on medium to large game. The 458 SOCOM is most commonly chambered in rifles and pistols built on the AR-15 platform. Marty contacted me, Buddy Singleton, at Southern Ballistic Research, LLC (SBR) in Brunswick, GA, and asked me to develop factory loaded ammunition for the 458 SOCOM. Based on the favorable reviews, commercial production was started and the initial rifles were produced by Tromix. In particular, the reports from members of Task Force Ranger in Mogadishu, Somalia as part of Operation Gothic Serpent that multiple shots were required to neutralize members of the opposing force led to the request to develop a new cartridge that would deliver far more energy from short barrels at relatively short distances.Īfter the design was completed, Tony Rumore of Tromix Corp in Broken Arrow, OK was contacted to build the first prototype. The impetus was an informal ("beer and barbeque") discussion with a senior member of the US special operations community regarding the apparent lack of effectiveness of the 5.56 x 45 rifle cartridge in a recent conflict. It was developed by Marty ter Weeme, founder of Teppo Jutsu LLC in 2000. The 458 SOCOM (aka: 11.5x40mm RB) is a large caliber cartridge designed for use on the AR15/M4 platform.
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