Contact SBR Ammunition for help with loading data. So I went back to the beginning, back to Wilson Combat. If you get one let my know and I'll send you my load data. Go to the 458 Socom forum and hang around for a while. It seems the .458 SOCOM gains very little velocity past 16-17 inches. Their 14.7″ Recon SR Barrel has a purpose built .458 SOCOM barrel extension and 1:14 six groove right … The National Firearms Act (NFA) of 1934 limited a rifle’s barrel to a minimum of 16.1″ … .458 SOCOM Barrel Only $ 249.00 – $ 420.00 Select options.458 14″-16″ w/ Welded on Muzzle Brake – Barrel Only $ 395.00 Add to cart.458 1:10 Fast Twist – Barrel Only $ 325.00 – $ 370.00 Select options.458 16.25″ Unthreaded Barrel & Bolt Combo $ 324.00 Add to cart.458 16.25″ Light Weight Barrel & Bolt Combo $ 324.00 Add to cart My 17" barrel throws 300 gr. Since you are using it for bear defense, make sure you really ring in out with the exact load and bullet and mags you intend to use. Given the over the top build of this .458 SOCOM AR-15, I had to have an unquestionably awesome barrel. ar-15 458 socom barrel. There are a lot of 0.458 dia bullets available, not all are suited for the 458 SOCOM. This is due to the case overall length and the throat length limited within the AR15. X bullets at around 2060 fps. The Rock River is a great rifle. You're going to get a good bit more of muzzle blast and noise with a short barrel, however. underwood ammo (in stock) 0.0. ar-15/m16 458 socom billet upper receiver. 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. 458 AR's can be temperamental about feeding with certain bullets and mags. brownells (in stock) 2.0 (3) underwood ammo 458 socom 300gr match solid. Some sure, but not enough to offset the inconvenience of the longer barrel. All of these rounds are in the 300-350gr range besides the single subsonic .458 SOCOM … Loading dies are available from Lee, Redding, Hornady, CH, etc. I love shooting mine, I just haven't done as much with it since I went to the 6.8. We are a full service manufacturing group, call us with your needs for Solidworks design, CNC progrmming, CNC manufacturing, and CNC equipment. Manufactured from 4150 Chrome Moly Steel, this 1:14" Twist, 16" heavy contour barrel barrel gives you high quality at a great value. Remember to get the carbine length gas system as the mid length will only work with certain powders. KAK INDUSTRY is a design and manufacturing company that specializes in wildcat uppers for LR-308 platform and AR15. underwood ammo (in stock) 0.0. underwood ammo 458 socom 300gr xtreme penetrator. Additional features include a carbine-length gas system, M4 feed ramps, and a 5/8" - 32 threaded muzzle. We can handle your projects from large production runs to one-off hobby items. The .458 SOCOM achieves optimum ballistic performance in barrel lengths shorter than 16” so there is no need for longer, less portable barrels. The .458 SOCOM rounds have slightly lower recoil energies when compared to the .50 Beowulf, which has several rounds in the 39-32ft.lb range compared to the highest .458 SOCOM round at 28.89ft.lb. [ARCHIVED THREAD] - 458 SOCOM barrel length for hunting, carbine/pistol? When I had my upper built by Tony (Tromix) we discussed barrel length at length. In our opinion the .458 SOCOM has several design and performance advantages over the.450 Bushmaster and the .500 Beowulf including improved functional reliability and the use of a standard AR magazine. X bullets at 1755 fps and 250 gr. The 16″ length is the most common AR-15 barrel length sold today. ARCHIVED; ... IMO the best length if you go NFA or pistol is 12”, but if you want to stay non-NFA, a 14.5 inch with a break pinned and welded to get >16” is the way to go. It doesn’t do anything particularly better than other options, but it has good all-around performance. The AR-STONER™ 458 SOCOM Barrel provides high performance and accuracy for the 458 SOCOM round.