From a 16 in (410 mm) barrel, a 125 gr (8.1 g) 300 BLK round has a lower velocity and similar bullet drop and drift at shorter distances. The clear advantages of sub-sonic loads are, of course, sound suppression which can conceal both presence & position. The new cartridge was intended to negate many of the perceived drawbacks inherent to other large caliber cartridges used in the M4. user-select: none; Having the ability to reduce the noise from shooting your .300 Blackout Rifle to a mere 137 decibels, you don’t even need ear protection with your SIG suppressor mounted on. 300 BLK rounds are effective out of barrels as short as 4.5 in (110 mm). We did that, and called it the .300 AAC Blackout (.300 BLK)."[8]. … One popular choice is using a .30 caliber silencer to shoot rounds such as .308/7.62 NATO, and 300 AAC BLK, but also using it to shoot smaller .223 and 5.56 NATO rounds. The 6.8 SPC has a more difficult conversion because it was designed around the obsolete .30 Remington cartridge, requiring a different bolt and decreasing standard magazine capacity. If downrange … Tags ammo silencer subsonic supersonic suppressor. I don't see how supersonic .300BO would be any better, and subsonic .300BO is still putting out thousands of pounds per square inch, too. border: 1px solid transparent; The SST bullet has a polymer tip that initiates expansion and a jacketed construction that helps control expansion and gives it adequate penetration on game up to the size of whitetail deer. Its purpose is to achieve ballistics similar to the 7.62×39mm cartridge, or even more similarly, the 7.92×33mm Kurz cartridge in an M4 while using standard M4 magazines at their normal capacities. [2]), also known as 7.62Ã35mm is an intermediate cartridge developed in the United States by Advanced Armament Corporation (AAC) for use in the M4 carbine. Heavy for caliber bullets are often used to off-set lack of velocity and still provide great short to medium range performance. If you’ve chosen 300BLK to help accomplish this goal, you’re on the right track. It’s a multi-caliber suppressor, so... 2. On the other hand, supersonic offerings, when combined with suppression, will still conceal one’s position and affords longer range lethality due to flatter shooting, lower weight bullets. The.300 AAC Blackout, also known as 7.62×35mm is an intermediate cartridge developed in the United States by Advanced Armament Corporation for use in the M4 carbine. Previous … Ideally, cartridges would use one of the longer projectiles, a case-filling powder charge, and have the projectile crimped into place. text-align: center; margin-bottom: 10px; LE – Silencers – Science When it comes to the 300 Blackout, there are more options for rapid expansion in supersonic rounds than there are with subsonic loads. This will add versatility and a broader range of uses for this great platform. In terms of hit probability, the Blackout has an effective range of 460 meters. If that is what you want, the Gemtech is the right suppressor for you. Home defense in its most typical form is about getting yourself and your loved ones off the X. background-color: #ffc107; On October 23, 2011, SSG Daniel Horner of the USAMU used 300 AAC Blackout to win his fourth USPSA Multi Gun National Championship. .tfb-affiliate-link{ If you do use subsonic, make sure you know what that projectile is going to do at those slow speeds. It also penetrates deeper and initially yaws faster. font-size: 1rem; The only real advantages of an expanding subsonic over an expanding supersonic in a home defense situation are (in no particular order): Buy Discreet Ballistics 188gr Selous 300BLK Subsonic. [email protected], Reduced risk of over penetration from a pass through projectile. This gives a shooter an idea of what to expect recoil wise and the intended use of the round. vertical-align: middle; text-decoration: none !important; A supersonic 300BLK round that does not deform or tumble in soft tissue will create only marginally more trauma that a heavier non-deforming non-tumbling subsonic bullet. We had to take the .300-221 wildcat concept, determine the final specs for it, and submit it to SAAMI. The suppressor’s use of a fast-attach a muzzle device would ease your process of mounting the suppressor on your .300 Blackout rifle, or any other AR-style rifle you have in your arsenal. Working with those facts the 300 Blackout SBR at the muzzle is right on the threshold of no expansion or fragmentation with nearly every .308 bullet currently available (The exceptions are 3 limited production Barnes bullets). Posted April 10, 2019 in Ammunition, AR-15, Editorial, Subsonic Ammunition by Pete with No CommentsTags: 300 BLACKOUT, 300blk, Subsonic, supersonic, When we last left you, the discussion of choosing either subsonic or supersonic ammo for your 300BLK defensive weapon was in a full-on firefight. } } And a small percentage of you claimed that using a 300BLK AR15 in a life or death situation was nothing more than a mall ninja’s wet dream. The very advantage of the 300 BLK (its similarity to the popular .223/5.56 caliber) can also be a safety issue if ammunition of the two calibers is mixed. An argument for another day…. Part of today’s confusion over 300 Blackout effective range and barrel length often stems from this flavor..300 Blackout Subsonic Ammo. [4], To meet this demand, AAC developed the 300 AAC Blackout in cooperation with Remington Defense. The GMT-300BLK offers approximately 30 decibels of noise suppression to short-barreled rifles. text-align:center; What is the quietest .300 Blackout suppressor? However, the Integrally Silenced 300 Blackout rifle system is fully customizable to fit the needs of the consumer. Supersonic ammunition muzzle velocities and muzzle energies by barrel length: The 300 AAC Blackout was designed to achieve energies similar to the 7.62Ã39mm Soviet in an AR-15 while using standard AR magazines at their full capacity. border-radius: .25rem; It is able to replace the H&K MP5 for close quarters, and with just a magazine change, bring the fight to longer distances, outperforming the M4 carbine. With the Gemtech GMT .300 Blackout suppressor, not only will it … -ms-user-select: none; Ask The Experts: Subsonic Or Supersonic 300 Blackout Ammo … Maybe a greater margin of error for nicking a vital organ as a result of larger bullet expansion. But while energy transfer is very important it does not tell the entire story. Whether if you’re firing supersonic or subsonic .300 Blackout rounds, this suppressor will do the job for both. Verdict: … One example is the Freedom Armory Dragoon 7.62 Suppressor. Colt Firearms and other arms makers had previously chambered AR-pattern rifles and carbines in various .30 caliber rounds but encountered problems. Many of these rounds required an excessively long overall cartridge length that would prohibit feeding in a STANAG magazine while using powder charges that were not compatible with the pressure requirements of the M4 carbine. Well, we finally got setup with a .300 BLK demo rifle and took it out this weekend to mess around with it. To start out, we are just using the recommended load from AAC: Sierra 220MK bullet seated to 2.12" OAL 11.2 grains of A1680 What is the difference between shooting 300 Blackout sub sonic (with a suppressor) and say 5.56 in terms of noise. 300 blackout subsonic vs supersonic db. The barrels are all equipped with a standard A2 muzzle brake that’s been proven efficient and effective. [11][12], On 14 July 2017, the UK Ministry of Defence issued a tender for a five year (plus five years optional) contract to supply .300 Blackout supersonic and subsonic small arms ammunition. Scroll Down to discover. The Gemtech GMT 300BLK is also rated at a 36-39dB reduction for either supersonic or subsonic caliber. … As much as I love the quiet bliss of subsonic 300 Blackout in a suppressed carbine, given the choice, I’d still pick a supersonic round for a defensive situation. -moz-user-select: none; 300 AAC Blackout supersonic/subsonic sound comparison - YouTube In short, I’ll sacrifice ultimate sound suppression for nearly twice the muzzle velocity and energy all day and twice on Sundays. They are flatter shooting and, with less time in flight, less prone to the effects of wind. Another consideration for rifle shooters is often the size of the rifle’s action. 10 Best 300 Blackout Suppressors 1. Want to optimize the hush on a 300 Blackout pistol—or carbine—it’s a subsonic ammunition affair. The parent case of this cartridge is the.221 Remington Fireball necked up to take a.30 caliber bullet. The .300 AAC Blackout (designated as the 300 BLK by the SAAMI[1] and 300 AAC Blackout by the C.I.P. font-weight: 400; In both cases, it provides one of the highest noise reductions amongst its competitors. For those with a suppressor, the American Eagle 220g will provide a heavy projectile that when suppressed, is easy on the ears, which is important for close quarters that one may encounter in a home defense situation. white-space: nowrap; } I have a feeling I know how most of them will answer, but I’ve been wrong a few times in the past. If used with supersonic ammo, it will feature a noise reduction of 36 dB, while subsonic ammo will feature a noise reduction of 39 dB. .btn:not(:disabled):not(.disabled) { A military customer wanted a way to be able to shoot .30-cal. [17] Whether a 300 BLK cartridge actually is able to chamber in a .223 barrel depends on bullet length and shape, bullet seating depth, crimping, and the volume of powder charge. Expanding subsonic bullets have almost twice the material to work with which allows them to expand much larger than lighter expanding supersonic bullets – sometimes as much as three times original bullet diameter with machined solid copper. cursor: pointer; Since the mix up can easily be done, some suggest owners of firearms in both calibers carefully separate firearm and ammunition of the two types by, for instance, clearly marking the firearms and magazines, and visually inspect every round while loading magazines. Also noted was the fact that the ammunition type had already been in use.[13]. [3] It is mainly derived from the .300 Whisper concept, but differs in having been submitted to the SAAMI. line-height: 1.5; There are some loads on the market that do expand at subsonic velocities, but in general they still won’t expand as rapidly and violently as a supersonic load will so penetration may still be an issue. This is another option if you don’t have a pistol length gas system in your barrel or do not want to cut a few coils off your carbine spring. February 6, 2021 Category : Uncategorized I have to admit that this is a very fun round to suppress! A quick note on sub- and supersonic ammunition and suppression. In the case of the 7.62Ã39mm, its relatively severe case angle caused feeding issues unless specially modified AK-47 magazines were used, and even then results were unsatisfactory. At 200 yd (183 m), the 300 BLK drops 2 in (51 mm) lower than the 6.8 SPC, while it drops 30 in (760 mm) lower at 500 yd (457 m). If you’re hunting or trying to stay discreet in a case of home defence, this suppressor should find its applications as the situation requires. The Gemtech GMT .300 Blackout Suppressor is the best pick. Gemtech GMT-300BLK. display: inline-block; RELATED STORY: Silence of the Slams: 11 Big-Bore Suppressors Rounds such as the 6.8 SPC and 6.5 Grendel had similar parts-interchangeability issues but did allow for the use of the standard M4/M16 30-round magazine, albeit with a reduced capacity. Decibels don’t drop like flies with every load. Now, add that discharge in a closed room with no hearing protection and you will get a lot more noise as it will be reflected off the nearby walls and ceiling, just like shooting under a canopy or indoor range. Supersonic 300BLK can have nearly three times the kinetic energy as a subsonic 300BLK. From a 9 in (230 mm) barrel, the 125 gr BLK round has the same muzzle energy as the M855 from the M4, and 5 percent more energy at 440 meters. General guidelines dictate a 1:7 twist rate (there are also the odd 1:5 examples) for subsonic 300 Blackout and a 1:8 or slower for supersonic. .btn { Best Starter Kit for Concealed Carry: S&W M&P 9 SHIELD $429 Sportsman's Warehouse Safariland IWB Holster $44.99 Sportsman's Warehouse Safariland Duty Belt … While the next generation subsonic bullet for .223 in an AR platform hasnâ t been born yet (and I expect it will be a few years before it is), I imagine it will leverage off of the experience gained … We could not have just used .300-.221 or .300 Whisper because Remington is a SAAMI company, and will only load ammunition that is a SAAMI-standard cartridge. When you’re searching for anything like this, so perhaps the Gemtech is the one you ought to go for. 300 Blackout offers a range of performance, in both supersonic and subsonic loadings. Due to the higher velocity, you will encounter much louder report regardless of a suppressor, due to the supersonic crack of the bullet. Others chose faster and lighter rounds because “it’s a rifle, not a pistol”. You aren't getting away … Please keep it civil people. The speed of sound is 1,275 feet per second (fps) at sea level and varies slightly with temperature and atmospheric pressure. Logical on the surface, given faster twist rates are generally required for heavier bullets, but there is debate on the matter. I've seen videos of shooting suppressed, but of course almost anything recorded while shooting tends to overload youtube sound. Instead of just yelling at the clouds, I thought we could bring in a few experts in the field of ammunition development and ask them for their thoughts on the matter. Anything supersonic (almost any centerfire rifle caliber) is going to produce its own sonic boom (crack of the rifle shot); there’s nothing a suppressor can do to change that. The higher muzzle velocity of the 5.56 SBR gives it a much more practical buffer against the point at which rifle bullets no longer expand … However, even most of the supersoninc 300BLK ammo is designed for barrel lengths … It doesn’t matter if you’re using it just for hunting and/or for mere home defense purposes, this suppressor will show its full potential when the situation warrants it. 762-SD is the exceptional best multi-caliber suppressor that gives outstanding performance on hosts chambered 5.56mm, 6.8 SPC, and 300 AAC Blackout, despite the fact that it is optimized for 7.62mm x 51 ammunition. If you are looking for a suppressor to deliver the best in terms of noise reduction, this suppressor lowers the noise from shots to around a mere 130 decibels. Anyway, read through the responses below and let us know your thoughts in the comments section. While this was addressed initially by use of 300 Blackout in the AR-15 or M16 platform … Even though a .30 Cal silencer will suppress a gun shot from a smaller caliber, the sound isn’t as suppressed as it would if the shooter were using a model made exclusively for the round being fired.
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