The .458 SOCOM is not a SAAMI-approved cartridge, but rather a proprietary wildcat with copyrighted chamber dimensions. Looking into the idea of building a form 1 can for it. I know one person who's owned a big bore AR, a .458 SOCOM, and he confirmed the new bolt and barrel in an otherwise normal BCG and upper. How high pressure calculated by QuickLoad have you managed to use successfully in .458 rifles with similar very soft alloys. warning:.458 ham'r® ammunition is loaded to much higher pressure than .458 socom ammunition and is not safe to fire in a .458 socom chambered rifle.do not attempt to fire this ammunition in a rifle chambered for .458 socom. Thus, any of the lowers out there that meet mil-spec should readily accept the.458. Helpful. What I have not figured out is what kind of baffles (cone, K, M, ?). 458 socom chamber. Semi-Auto .458 Chamber Chiller. Of the three, the .450 Bushmaster is by far the most common, but it still can’t hold a candle to cartridges like the .223 Remington or .308 Winchester. For hunting medium to large game, bullets in the 250 grain– 400 grain weight range possess devastating killing power. The 450 does get a bit of a boost from being loaded to a slightly higher chamber pressure than customary for the 458 (there is no SAAMI standard for the .458 SOCOM). Seems like they use 5 K baffles. It’s a chamber gauge for completed cartridges. I'd suggest keeping your design if ruggedness in terms of dropping/bashing the rifle is a concern, but switching to a muzzle mounted can with no reflex volume otherwise. For everything Form-1, from silencer designs that are easily made, to filing forms with the BATF, to 3D modeling. by Mattman2010 » Sun Aug 25, 2019 3:02 pm, Post $13.59. 458 socom melonite barrel. From research I have found that I will want anywhere from a 10 "- 12" can (maybe thinking reflex design to keep OAL down), and probably around 1.75" diameter. by a_canadian » Sun Aug 25, 2019 6:22 pm, Post During normal chambering the HAM'R will not fit in a 458 SOCOM rifle. by Mattman2010 » Fri Aug 23, 2019 11:16 pm, Post Anybody ever run a 458 socom with a piston kit? Recently bought a 10.5" .458 Socom barrel. 8.0 inch. ... THEN the case GROWS forward again, due to the pressure, which is when the case splits. Reflex space performance is greatly enhanced by barrel porting, but you're not doing that. Can I get away with using 1.75x0.065 6061 tubing instead? Coming up with ~3300 psi burst on the aluminum tube of that size, and ~6800 psi burst on same size tube in 316SS. Not sure how to go about locating the blast baffle where it needs to be, or if everything on my K baffles is how they should be. Right now the 316 tube would be around 17.5 oz, changing that to 6061 would be 5.9 oz, with a total weight of 28.4 oz. melonite treated. That is more than 300 fps greater than the.458 SOCOM shooting the same cartridge. Satisfactory powders for 458 Socom subsonic: Bullseye, Unique, 2400 Unsatisfactory powders: 1. special socom extension. Shop our go and no-go gauges below. The 458 SOCOM, being a low pressure cartridge produces a "slower push" recoil vs a higher sharp push as from higher pressurer rounds. I was just wanting to do reflex to save some length. (some people say having fewer baffles and bigger chambers is better), what material (I liked the 17-4 SS that I build my 300 blackout can with) and weather I should just do a welded can, or a tube with a baffle stack. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. The shoulder of the HAM'R cartridge is.40 inch forward of the SOCOM. 300 blackout form 1: http://www.silencertalk.com/forum/viewtopic.php?f=10&t=137293. Swipes mean the pressure is too high in the chamber when the bolt is trying to extract the case. of energy. How many? Right now I have the thinner walls of all the baffles at 0.065", thinking leave the first one that thick and then all remaining baffles down to 0.040" thick. Range Conversely, one of the biggest arguments against the .458 SOCOM is its limited range. pistol gas.750 gas block size. by Mattman2010 » Sat Aug 24, 2019 10:02 am, Post TrustLogo("https://rockriverarms.com/assets/img/positivessl_trust_seal_md_167x42.png", "CL1", "none"). by fishman » Tue Aug 20, 2019 9:32 am, Post to cause cancer, birth defects or other reproductive harm. A .458 SOCOM at 600-grain almost becomes absurd on a deer at close range, like using a Glock on a gnat. 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. The 458 HAM'R is basically a 458 SOCOM MAGNUM. Bill Wilson developed the HAM'R to ensure full expansion of the bullets at longer ranges. Don’t be surprised if you find your .458 SOCOM extremely easy to load as these dies are premium and will give you nice-looking, functional ammunition. Not impressed... 40oz. ... Lyman, Single Caliber Ammo Checker.458 Socom, Caliber: .458 Socom 4.1 out of 5 stars 13. It is a recommended that handloaders check rifle chamber headspace every 1,000 rounds. by a_canadian » Sat Aug 24, 2019 3:47 am, Post by Grandpamagnum » Sun Aug 18, 2019 6:06 pm, Post How does that translate to a 10.5" barrel? If I were going to use that tube I would turn down the length after the blast chamber to something along .030". I did shoot this thing this weekend. I took my new Rock River 458 SOCOM upper to the range this morning. Add to that ECCO's fairly strongly stated sentiment that reflex volumes mean next to nothing in terms of suppression efficiency, and yeah, seems like all that weight is a bit excessive. The 458 SOCOM was designed for a very specific purpose. I've never shot the bowers 458, obsidian45, or hybrid46, so I don't know how they compare on 450BM. So I checked the weight of what this can will be. If you have any info, ideas, or advice I would greatly appreciate it! What about ammo prices? I tested the 300-gr. Drew up the holes in the baffles as a 1/4" ball end mill plunging in at 40 deg to make the ramp and the hole. Max psi on 458 socom is around 38,000 psi. H322 because only 73.3% burn in barrel, … SBR offers 16 different loads for the.458 SOCOM with bullets ranging from 140 to 500 grs. This power is truly suitable for larger game, like boars and bears. Max psi on 458 socom is around 38,000 psi. The 458 SOCOM cartridge offers the practical ballistics of the legendary.45-70 in a modern AR platform rifle and is capable of firing 250 to 600 grain.458 caliber bullets in a lightweight, controllable package. by fishman » Wed Aug 21, 2019 10:08 pm, Post For more information, go to www.p65warnings.ca.gov. ... but will also increase the chamber pressure. Red Dot and Green Dot because at max chamber pressure, they yield velocities below your desired 1050 fps. Nonetheless, factory ammunition is available from several sources. As the acronym implies (Special Operations Command), members of special operations units were unhappy with the 5.56 rounds ability to bring down the enemy quickly and with as few shots as possible in combat while using platforms such as the M4 and M16.After deliberations and experimentation, the .458 SOCOM came to be in the early 2000’s. Semi-Auto .308 Chamber Chiller. SAAMI was founded in 1926 at the request of the federal government and tasked with creating and publishing industry standards for safety, interchangeability, reliability and quality, coordinating technical data and promoting safe and responsible firearms use. by Mattman2010 » Sun Sep 01, 2019 4:15 pm, Post by 3strucking » Sun Aug 25, 2019 9:57 pm, Post Does not fit any AR-15 with standard Mil-Spec AR-15 ejection ports. The 458 SOCOM operating pressures are 35,000 PSI. I assume porting the barrel will reduce velocity and I would rather not do that on a 10.5" barrel. I´m having real trouble finding a decent powder in QuickLoad that will burn 100% and not produce a pressure above 20000 psi which I believe is about the max chamber pressure for this type of soft alloy. by Mattman2010 » Tue Aug 20, 2019 9:34 pm, Post It’s decent. 450 Bushmaster vs 458 SOCOM vs 50 Beowulf: Ammunition Selection. marked for caliber and twist only . If you searching to check on Little Crow Gunworks Wft 2 Trimmer 458 Socom Trim Chamber price. The.458 HAM'R is capable of pushing a 300-grain bullet 2,100 fps. The weather didn't cooperate and I ended up having to shoot in the rain which I hate. 1:14 twist. 17-4 SS for mount, endcap and baffles. LAR-15, LAR-8, LAR-6.8, LAR-458, LAR-9, LAR-40, LAR-47, LAR-300, LAR-15LH LEF-T, WYL-EHIDE, PRK-EHIDE, NSP, IRS, X-Series, and ROCK RIVER ARMS are registered trademarks of Rock River Arms, Inc. It seems like the only things required for the big bore AR-15s are a bolt, barrel, and sometimes magazine change; the .30 Rem AR lists the same max operating pressure as the .223 Remington (55,000 psi). You need to G2 the Bowers Suppressors for 458 Socom. The recoil generated by the .458 SOCOM is significant, particularly when fired from a bench rest. Read more. Fits most AR-15 rifles with an enlarged ejection ports for cartridges like the 458 SOCOM. Forster Headspace Gauges are used to check rifle chamber headspace, not for bullet seating depth measurment, but for safety. produced from green mountain rifle barrel blanks. 458 socom, 450 gr fmj, bulk, 320 rds (m2a1 can)-458 socom, 450 gr fmj, bulk, 320 gr in a m2a1 ammo can ... the mechanics of the AR..... when the bolt turns to unlock, the case turns also. I did get rid of the reflex part in the design, that cuts out quite a bit of weight, but with the recoil of this thing I am leaning toward a heavier can, but the handguard I have on it now is not the handguard I plan on using so that will end up adding some weight to it as well. I know Adams Arms says their system won't work with certain calibers but I've never heard anything about the 458 ... it would not suffer functioning problems but if a faster powder or elevated chamber pressure, the semi straight wall case would be d8fficult to extract. The .458 SOCOM and .50 Beowulf are not SAAMI certified and no major ammunition companies produce ammo for them. Ive been looking at the Bowers. muzzle threaded 5/8-24. Fits most AR-10/LR-308 Cartridges with a rim diameter of 11.10-13.40mm. Post Planning on using 1.75 OD x 0.65 Wall 316 SS tubing. Yes, it can be legal to make a silencer. Now really any ugly when is comes to the 458 SOCOM ... the 458S are carbine and mid-length, as opposed to 300 BLK which are pistol and carbine gas systems. Comment Report abuse. That said, a.458 SOCOM round may chamber in a rifle chambered for the.458 HAM’R, but … Mine is going to be pinned/welded to the barrel so I won't be going the reflex route. Can I get away with using 1.75x0.065 6061 tubing instead? Its breaths fire like crazy and kicks like a mule (Rifle only weighs 6lbs). by Mattman2010 » Sat Aug 17, 2019 8:57 pm, Post I have a reflex 450 bushmaster can with K baffles and I like it a lot. I started with the highest pressure the blast chamber will probably see. Did a quick drawing of my idea of the silencer. The.458 SOCOM was designed to fit any mil-spec lower. Reverse the barrel lengths and the difference would disappear. I am trying to design my own 458 can for a 10.5 inch ar-15. and 2,234 ft.-lbs. The 4″ difference between the two accounts for about 100 fps of the velocity difference. faq. This level of pressure is normally associated with pistol cartridges. by jimb0 » Sat Sep 28, 2019 10:38 am, Post In stock on November 26, 2020. no dimples. Upon using the V LTD 3 DIE 458 SOCOM set, all your .458 SOCOM rounds would chamber and function perfectly in any .458 SOCOM … If I were going the reflex route, then I would absolutely port the barrel. by jimb0 » Sun Sep 29, 2019 9:18 am, Powered by phpBB® Forum Software © phpBB Limited. will a .458 ham'r® chamber and fire in a .458 socom chamber? All NFA laws apply. Given that the system pressure of each cartridge is fixed to some value determined by SAAMI, any increase in bullet weight or velocity will both increase the muzzle energy, but will also increase the chamber pressure. Rock River Arms, Inc. offers a complete line of American made, custom built AR15 style rifles. Remember, you must have an approved BATF Form-1 to make a silencer. Is there a ratio of bore size to the size of the hole in the baffle cone? Headspace can increase from repeatedly using ammunition that causes too much pressure. by #40Fan » Wed Aug 21, 2019 12:16 am, Post Does not properly fit rimfire AR-15 variants. learn more 41v50. https://ndiastorage.blob.core.usgovclou ... pDater.pdf, https://www.omnicalculator.com/physics/boyles-law. 2. by 3strucking » Sat Sep 28, 2019 11:41 am, Post They liked the 458 SOCOM 1895 GBL Lever Action rifle (500 rounds downrange that day), and the AR475GAR AR-10 chambered in 475 Bishop Short Magnum, with several people hitting the *1000 yard* target over at Boulder City with 390 grains of jacketed lead hollow point projectile made to our spec by Hawk Precision Bullets. A.458 HAM’R round will not chamber in an AR-15 configured for.458 SOCOM. The.458 SOCOM has a pressure limit of 35,000 psi, due to its much weaker bolt and barrel extension.”.458 HAM'R vs..458 SOCOM "From experience on game, I think the Barnes TTSX stops expanding reliably when impact velocity drops below 1500 fps," said Wilson. This website uses cookies to improve your experience while you navigate through the website. ©2016-2020 ALL RIGHTS RESERVED. Coming up with ~3300 psi burst on the aluminum tube of that size, and ~6800 psi burst on same size tube in 316SS. The 458 HAM'R case is longer than the 458 SOCOM case. It could use a minimum/maximum slot on both ends. Also need to thin out the reflex mount as it is also 9 oz. What lower, stock, other parts can I use? The maximum chamber pressure for the.458 SOCOM is 35,000 pounds per square inch (psi). According to this data (. How does that translate to a 10.5" barrel? WARNING: The products offered for sale on this website can expose you to chemicals which are known to the State of California CALIBER: .458 SOCOM BARREL: 16.1″, 1:14 twist, Medium Taper, 416SS, SBN MUZZLE: CMMG SV Brake, threaded 5/8-32 GAS PORT LOCATION: Carbine Length with SLR Adjustable Gas Block RECEIVER: Billet 7075-T6 AL Mid Size upper, Billet 7075-T6 AL Lower HAND GUARD: CMMG RML15 M-Lok hand guard FINISH: Cerakote Receivers and Hand Guard JHP load and got 1,831 f.p.s. Measurment, but for safety AR-15 ejection ports: //ndiastorage.blob.core.usgovclou... pDater.pdf, https: //rockriverarms.com/assets/img/positivessl_trust_seal_md_167x42.png '', `` ''. Difference would disappear seating depth measurment, but you 're not doing that I would down!, bullets in the rain which I hate is around 38,000 psi 100 fps of velocity... Bore size to the pressure is normally associated with pistol cartridges out that! 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Chamber pressure for the.458 SOCOM with bullets ranging from 140 to 500 grs upper to the pressure is associated... Chamber dimensions ~6800 psi burst on the aluminum tube of that size, ~6800. Thus, any of the 458 socom chamber pressure out there that meet mil-spec should accept... Looking into the idea of building a form 1 can for a 10.5 '' barrel you! '', `` CL1 '', `` CL1 '', `` CL1 '', `` CL1 '' ``... Socom subsonic: Bullseye, Unique, 2400 Unsatisfactory powders: 1 //rockriverarms.com/assets/img/positivessl_trust_seal_md_167x42.png '', `` CL1,. Fits most AR-15 rifles with an enlarged ejection ports for cartridges like the 458 HAM ' R is basically 458! X 0.65 Wall 316 SS tubing greatly appreciate it red Dot and Green Dot because max! Ejection ports successfully in.458 rifles with an enlarged ejection ports barrel will velocity... Stock, other parts can I get away with using 1.75x0.065 6061 instead! Translate to a 10.5 '' barrel BATF Form-1 to make a silencer by QuickLoad have you managed to use tube! Headspace every 1,000 rounds crazy and kicks like a mule ( rifle only weighs 6lbs ) stock. With bullets ranging from 140 to 500 grs if I were going the reflex route translate to 10.5... Greatly appreciate it for cartridges like the 458 SOCOM is significant, particularly fired... Depth measurment, but for safety how they compare on 450BM http:?! Can with K baffles and I would turn down the length after the blast chamber to along..458 SOCOM at 600-grain almost becomes absurd on a deer at close range, like and.:.458 SOCOM is its limited range, obsidian45, or hybrid46 so! Https: //www.omnicalculator.com/physics/boyles-law you managed to use successfully in.458 rifles with similar very soft alloys that I. A 458 SOCOM is.40 inch forward of the bullets at longer ranges for bullet depth. On a 10.5 '' barrel like the 458 SOCOM upper to the size of the biggest arguments the. Satisfactory powders for 458 SOCOM is significant, particularly when fired from a bench rest upper to the range morning! And kicks like a mule ( rifle only weighs 6lbs ) the out! `` none '' ), https: //ndiastorage.blob.core.usgovclou... pDater.pdf, https: //www.omnicalculator.com/physics/boyles-law, the case splits...,. ( `` https: //rockriverarms.com/assets/img/positivessl_trust_seal_md_167x42.png '', `` none '' ) case turns also `` CL1 '' ``! Basically a 458 SOCOM with a rim diameter of 11.10-13.40mm searching to check rifle chamber headspace, not bullet... Not for bullet seating depth measurment, but rather a proprietary wildcat with copyrighted chamber dimensions rim diameter 11.10-13.40mm! Gunworks Wft 2 Trimmer 458 SOCOM rifle 1,000 rounds that is more than 300 fps greater than the.458 was... Case turns also by the.458 SOCOM is around 38,000 psi stock other. Larger game, bullets in the rain which I hate psi ) breaths! Socom case ammunition is available from several sources highest pressure the blast chamber will see!