I say "claimed" with the .458 SOCOM, because that's what the designer's say in their sales hype, but other sources say it's more like 1,750 to 1,800 fps, or, about the same as the .45-70. Marty ter Weeme, founder of a company called Teppo Jutsu, L.L.C., went to work. With those weights, you don't have enough powder capacity in the .458. It was intended to make up for the limitations of the 5.56 rounds by accommodating larger diameter bullets with more destructive force. However, you need to keep a close range of around 150 yards to make sure you hit your target. In short, a short, fat case (1.575) with a very small rebated rim (.473), minimal taper, and a slight shoulder. Over the chronograph, velocity 15 feet from the muzzle measured 1,927 fps with a deviation of 18 fps — very consistent performance — and it showed on the target. Now, your .223 AR has morphed from a varmint getter to a full-fledged deer-, bear- and elk-stopper by simply changing the upper — no new FFL transfer required. Combined with the wide selection of bullets available in .458 diameter, this cemented the choice of caliber. If you're like me you soon get pretty suspicious of gun writers who seem to get sub 1-inch, 100-yard groups from everything they shoot. The Brush Country of south Texas is usually hot, dry, and covered with thorny brush thick enough to stall a bulldozer. You can make a fatter case work, but you can't be very much longer. What do you get when you cross an AR-15 with a crossbow? If you want your 458 to handle heavier rounds, you will need to have an upper receiver that’s strong and durable enough. The end result is a bit of an odd-looking case, but one that accomplishes all the goals. A SOCOM 458 usually drops at past 300 yards while the Winchester 308 could go beyond 1000 yards before hitting the zero drop. The 458 SOCOM was designed for a very specific purpose. ArmaLite engineers simply took their .308 AR-10, made it smaller, chambered and timed it for a new, hot .22 based on a blown-out .222 called the .22 Special, later named the .223, and resubmitted it as the AR-15. If you’ll be shooting within 100 yards, then you clearly don’t want your accuracy to suffer and force you to move even closer. Hand-made quality. At the time, the .499 LWR cartridge was still in development phase and had not been chambered commercially. The.458 SOCOM (which stands for Special Operations Command, by the way) can handle bullets ranging 140 to 600-grains.  In 2009, Barnes developed a new bullet specifically for use in the .458 SOCOM, the 300 grain Tipped Triple Shock X, also known as the TTSX or TAC-X. Thinking about trying out a kayak when it comes to getting those skinny-water fish? There was never a failure to feed, it never jammed, or gave me a problem of any sort. Pulling the bullet showed a powder charge of 29.2 grains of a flake powder that filled the case to about 2⁄3 capacity. We have found that the .458 SOCOM offers peak downrange performance when firing … In 2000 a sledgehammer cartridge that would launch 250- to 600-grain .45 caliber bullets from a standard size AR-15 with a proper barrel and chamber was born — enter the .458 SOCOM. A few hunters offer some tips for camouflage for all seasons and hunting... Want to minimize the wear and tear on your wheels when you're out on the hunt? The .223 magazine only hold three rounds of .458, making it legal for hunting where magazines are limited to five rounds or less. The website dedicated to the .458SOCOM, where load data and other info also available. You want to unleash the full potential of the .458 SOCOM round. Hot loads are more trouble than they're worth. Quantity in stock: No items available Weight: 0.75 lbs Our price: $ 18.50 … Remage barrel nut not included. With great power comes great durability, hopefully. No one will argue the effectiveness of those cartridges on deer, but for bear, elk, and moose, the job had to be left to its bigger, heavier brother, the AR10 — where the mega rounds are found. The 300-grain (19 g) round offers a supersonic muzzle velocity of 1,900 ft/s (580 m/s) and 2,405 ft⋅lbf (3,261 J), similar to a light .45-70 but with a much smaller case. It's a very easy case to load for, as long as your dies don't push the minimal shoulder back. The .45 Professional was ruled out because, in an interview with industry press, the developer of said cartridge stated that steel proprietary to General Motors was used in the bolts and extractor to withstand the high operating pressures. A small game rifle has to be very accurate -- close enough is not an option. Expect groups no larger than 1.5″ at 100 yards and effective terminal ballistics. 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