At 200 yards, the 5.56 was stronger in two comparisons but weaker in one. Clearly you can’t say that one is more powerful than the other. This is an interesting result, as each one has a potential advantage for power; the 5.56 is faster, but the .300 Blackout has a heavier projectile. In the end, this results in a draw.This is because the Russians measure bore diameter differently from Americans (more details on that here ). Though they are similar in overall size, the .300 Blackout has a slightly longer overall length (2.26″ vs 2.2″), but the 7.62x39mm has a slightly longer case length (1.528″ vs 1.368″).This is one of the newest and most revolutionary weapon and ammo configuration adopted by the US military. 300 blackout and the MCX weapon is a specialized t...But to 200 yards, the difference is less than two inches. That higher velocity also means that the 6.8 cartridge has a higher muzzle energy than the 300 BLK, clocking in at about 1,694 foot pounds for the 115gr variant to 300 BLK’s 1,360 for their 125gr offering. And the 6.8 SPC’s performance only improves with added weight.300 BLACKOUT VS 5.56. .300 blk ammo are bigger rounds than 5.56; in terms of ballistics, it packs a much bigger punch on impact. 5.56 shoots flatter and flies at higher velocities, while costing half the …At 200 yards, the 5.56 was stronger in two comparisons but weaker in one. Clearly you can’t say that one is more powerful than the other. This is an interesting result, as each one has a potential advantage for power; the 5.56 is faster, but the .300 Blackout has a heavier projectile. In the end, this results in a draw.Well, I’ll try. Let’s take a 556 SBR DESIGNED popular round - Hornady 75gn TAP. According to their website, out of an 11.5 sbr, you get approximately 850 lbs of energy AT THE MUZZLE. Let’s round up and call it 900 lbs. Now, take a 9 inch 300 blk 110 gr hornady tac tx and at the muzzle you get approximately 1050-1200 lbs of energy.7.62×39 vs 300 Blackout: The Ultimate Showdown Between Classic and Modern Rounds. When it comes to rifle cartridges, there’s always a hot debate, and one of the latest controversies is the 7.62×39 vs 300 Blackout. These rounds may come from different eras and different parts of the world, but they’re increasingly compared in …Fun Gun Reviews Presents: "300 AAC Blackout : What's the Big Deal?" We take a look at the 300 AAC Blk and compare it to the 5.56 and 7.62x39 rounds. Plus wha...The 5.56 NATO pushes lighter bullets at faster velocities, while the 300 Blackout launches heavier bullets at moderate and subsonic velocities. Ballistically, …An H3 buffer similarly should be between 5.4 and 5.5 ounces depending on the manufacturer. Finally, a Rifle buffer should weigh 5.1 to 5.3 ounces and is noticeably longer than the carbine varieties. ... H2 with a Sprinco blue spring functions beautifully in my 300 Blackout with a Faxon 9″ gunner barrel with pistol gas, a Sons of Liberty ...Although the 300 Blackout bows to the 458 SOCOM in terms of muzzle energy, the 300 BLK’s flat trajectory makes it a much better long range cartridge than the 458. At 300 yards, the 125 gr 300 BLK round has -29.7” of bullet drop compared to …300 Blackout vs 5.56 NATO: Terminal Ballistics. There is no practical weight difference between a 556/223 AR-15 and a 300 BLK AR-15 with the same barrel length. The short casing of 300 Blackout facilitates the powder to burn quickly and allows gas to build up much more effectively in a short barrel.Nov 8, 2023 · On this episode of Ultimate Barrier Testing, we will be comparing the performance of the 300 Blackout to the 5.56x45 on 4 different targets. Each target is ... Dec 14, 2021 · When it comes to performance downrange, the 7.62x39 Vs. .300 Blackout differences show, despite the fact both cartridges are .30-caliber—.308-inch. That diameter is one of the sweet spots for long-distance connections according to some. The 7.62x39 mm SAAMI specs allow it to go slightly wider, which may explain a slight gap in performance. Nov 13, 2020 ... WHICH IS YOUR FAVORITE??? CMMG here: https://bit.ly/3cHkvMp Pinty reflex site: https://amzn.to/2PY3Wlx Truly appreciate you watching the ...The PMAG 30 AR 300 B GEN M3 is a purpose-designed magazine for rifles chambered in 300 Blackout® (300 BLK). Since its inception, 300 BLK shooters have had to use a magazine designed for another cartridge, limiting its ultimate performance and compatibility. One of the key features of 300 BLK is the compatibility with 5.56x45mm parts, but with ...Dec 14, 2021 · When it comes to performance downrange, the 7.62x39 Vs. .300 Blackout differences show, despite the fact both cartridges are .30-caliber—.308-inch. That diameter is one of the sweet spots for long-distance connections according to some. The 7.62x39 mm SAAMI specs allow it to go slightly wider, which may explain a slight gap in performance. Terminal performance of .300 AAC Blackout is less velocity-dependent than 5.56mm and therefore a short-barrel platform is not only a good idea, the cartridge was literally made for it. As to pistol-caliber AR pistols, these are probably the best bang for your buck. Recoil will be drastically less than an AR pistol or SBR in 5.56mm or .300 BLK.Nov 9, 2016 · 300 BO is a necked up 5.56. uses the same mag's and BCG as 5.56, just swap barrels. 7.62x39, 7.62x51, 5.56 are all NATO rounds, so they are pretty common everywhere. 7.62x51 is .308 win, but at a lower case pressure than .308. you can shoot 7.62x51 in .308, but not the other way around. Nov 8, 2017 ... Just going over some versatility of the .300 AAC over the 5.56, as well as the modular capabilities of both calibers in an AR platform ...Jun 14, 2015 ... Some 300blk rounds, mostly subs, are a bit longer than 5.56 and will hang up on the front of mags. I've mostly seen it with GI mags. If you have ...The most obvious difference between the 300 Blackout vs 223 Rem is the bullet diameter that each rifle cartridge fires. The 223 Remington fires a 0.224” diameter bullet while the 300 BLK uses a 0.308” diameter bullet. Both cartridges have the same overall length so they can fit in standard AR-15 mags. Oct 4, 2012 ... Wanted to do some penetration tests with some of the different calibers for the AR15 Platform. 5.45x39 5.56 300 Blackout and 7.62x39.We dive into that in this blog by comparing the 300 blackout vs 556 NATO. 300 Blackout vs. 9mm Parabellum. After 5.56 NATO, 9mm is one of the most popular calibers that are commonly used and actively sought after (especially during the pandemic). With regard to building a new AR-style rifle one could pursue an AR-9 which would be …The primary difference between 223 and 300 Blackout is the bullet diameter each rifle cartridge fires. The 223 Rem fires a 0.224” diameter bullet while the 300 ...But when it comes to the game I think it doesn't actually change the damage that much, but it's more about the actual armor penetration you get. So, technically speaking, the more penetration you have the faster you kill your target since you get through their armor more easily. But, it's supposed to have "worse tissue damage" with higher ...The SilencerCo Gas Defeating charging handle will function with all standard AR 15 calibers, so .300 Blackout bubbas aren’t left out. This robust charging handle is made from 7075 aluminum and is tough as nails. It’s tough and perfectly suited for professional, home defense, and even competition use.Compare the ballistics, terminal performance, and shootability of two popular AR-style rifle cartridges for hunting. Learn the pros and cons of each caliber and how to choose the best one for your needs.The .300 BLK is suitable for hunting deer, but for larger game like bear or elk you’ll want the extra power of the .300 Win Mag. The .300 Win Mag burns 20% to 25% more powder than the .30-06 Springfield, which gives it a 10% increase in velocity, as long as it is firing bullets of the same weight. This cartridge also requires about 80 grains ...Mar 1, 2022 · This is largely because .300 BLK achieves full powder burn out of a 9-inch barrel, while 5.56 requires a 20-inch barrel to reach its ballistic peak. In fact, a 110-grain .300 BLK bullet fired out of a 10.5-inch barrel has slightly more muzzle energy than a 55-grain 5.56 bullet fired out of a 16-inch barrel! If that wasn’t enough to illustrate ... 300 BLK is a .308 projectile in a necked up 556 case, with the same cartidge overall length. This makes it compatible in most 556 platforms, bolts, even many mags, etc. 300 BLK has an option to fire subsonic, heavier bullets while still operating semi-automatically. It's much quieter than a suppressed normal 556.The .300 Blackout allowed users to simply retrofit a .30-caliber barrel to their rifle without making any other changes, as the .300 Blackout uses a .223 case cut down to accept the .30-caliber bullet, meaning the bolt and magazine for a .223 or 5.56 firearm would work for a .300 BLK round. Therein lies the potential for misuse.Now cons 300 blk is expensive, especially right now. There is less ammo selection too so its a bit harder to find than 556, especially right now. There isnt really 300 blk plinking ammo per se. 300 blk is a great round and a very good defense round as well but the cost benefit with it doesn't work out for a lot of people, especially new shooters.But when it comes to the game I think it doesn't actually change the damage that much, but it's more about the actual armor penetration you get. So, technically speaking, the more penetration you have the faster you kill your target since you get through their armor more easily. But, it's supposed to have "worse tissue damage" with higher ...It is not like 223/556. 300 AAC is what the company AAC named after because of 300 whisper project. The correct name is .300 AAC Blackout. .300 Whisper is in most cases compatible will .300 AAC Blackout barrels and chambers. Yea 300 B0 stands for “black out” and 300AAC stands for “Advance Armament company.8 days ago ... 300 BLK vs 5.56: The endless debate continues... Which one are you choosing and why?. 13:53. Go to channel ...In today's video, we will be comparing the performance of the 5.56 NATO to the 300 Blackout on mild steel. These cartridges are very similar in length but ar...Scenario: You own AR-15s both in the standard 5.56 NATO chambering and in .300 Blackout. You get to the range one day with your 5.56 rifle and discover - oh ...May 6, 2022 ... It instantly exploded in popularity due to its ability to fit, feed and function in an AR-15. A standard 5.56mm AR-15 only needs a new barrel ...For example, costs of 300 Blackout rounds range from $.60 per round to $2.00 per round. That gives it an average of $1.30 per round. In comparison, the .308 ammo costs range from $.35 per round to $1.50 per round with an average of $.90 per round. That makes the 300 Blackout about 45% more per round on average.Nov 8, 2023 · On this episode of Ultimate Barrier Testing, we will be comparing the performance of the 300 Blackout to the 5.56x45 on 4 different targets. Each target is ... Jan 28, 2021 · The 300 Blackout was designed to be used with suppressors after all, and this is where it shines. Because the round burns its powder so quickly, and because of the larger 220gr, subsonic bullets, you can get much better performance out of a suppressed .300 Blackout round than any .223 or 5.56 round. Jul 22, 2018 ... We test out these two AR style calibers! Both the 5.56 and the 300 AAC are very cool rounds. Had a lot of fun making this video.Subsonic 8.6 Blackout can shoot out to around 400 yards. The other benefits to 8.6 Blackout versus a 308 Win or larger caliber is that similar to its little brother, the 300 Blackout cartridge, there is very little felt recoil with 8.6 blackout. You can build or buy an 8.6 Blk rifle in bolt action or semi-automatic.For hunting, both the .300 BLK and .223/5.56 are limited to about 100 yards on most deer-sized game using the proper bullets. Despite what you hear today from the 6.5mm crowd, small bullets are still small bullets and a 5.56mm isn’t really ethical past 100 yards on a deer, but is fine on smaller game at longer distances.Learn the history, specs, and performance of the 300 Blackout and 5.56mm NATO rounds for the AR-15 platform. Compare their ballistics, velocity, accuracy, and suitability for …Jan 22, 2023 · Mid Range (300-600m) Shooting. . The short version is, the 5.56 is more accurate and better at extended range, while the .300 BLK has more of an impact on organic targets at close range, and works better with a suppressor. The big thing to keep in mind is that there’s no one round to rule them all here. Whether you go camping or fishing, or you just have one around the house in case of a blackout, waterproof flashlights are essential. We may be compensated when you click on produc...The .300 blk and .308 Win are fairly similar in pricing and can be found in a range of $1.25 to $2.50 per round. The .308 Win is a more popular round so you can have better deals. Additionally, the .308 Win has a ton of bullet options available for it, along with a lot of other information and data.The 8.6 Blackout is a relatively new caliber, and as such, it is significantly larger than the 300 Blackout. Specifically, the 8.6 Blackout cartridge has a case length of 1.75 inches and an overall length of 2.7 inches. The 300 Blackout, on the other hand, has a case length of 1.37 inches and an overall length of 2.26 inches. 2.300 Blackout vs 5.56 NATO: Terminal Ballistics. There is no practical weight difference between a 556/223 AR-15 and a 300 BLK AR-15 with the same barrel length. The short casing of 300 Blackout facilitates the powder to burn quickly and allows gas to build up much more effectively in a short barrel.When it comes to picking a winner between 300 Blackout and 9mm, it’s going to come down to your unique needs, and what use you had in mind. The 300 Blackout offers a far greater effective range and an even higher degree of versatility than the 9mm, making it a superb choice for hunting and tactical needs. The 9mm, however, …Mar 13, 2022 · The L5AWM .300BLK from lancer systems is made from the same ultra-durable polymer construction and steel feed lips as the 5.56 L5AWM. The internal geometry is designed specifically to help heavier grain .300 blackout subsonic ammo to stack properly, improving the reliability of the magazine feed even on full-auto. Mid Range (300-600m) Shooting. . The short version is, the 5.56 is more accurate and better at extended range, while the .300 BLK has more of an impact on …It is not like 223/556. 300 AAC is what the company AAC named after because of 300 whisper project. The correct name is .300 AAC Blackout. .300 Whisper is in most cases compatible will .300 AAC Blackout barrels and chambers. Yea 300 B0 stands for “black out” and 300AAC stands for “Advance Armament company.Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch …Jun 14, 2022 · Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch me vlog. http://www.y... The 5.56 NATO/.223 Rem. and the .300 BLK are two popular cartridge options for the AR-15. Which one should you choose? Here's a quick rundown of the …Though the 5.56 has a greater range (500 yards compared to 300 yards), the .300 blk is more effective when it comes to hunting. Weight. The .300 BLK is filled with 110 to 220 grain bullets while the 5.56 sports 40 to 77 grain. This makes the 5.56 approximately 40% lighter than the .300. Availability.5.56 ammo will be more available in general let alone an end of world scenario and have a little further range. Although the 300 will be more fun to shoot suppressed with subs. I’d go with 5.56 first you can always buy another 300 upper later to swap back and forth for fun. 3.In today's video, we will see whether or not the 300 Blackout has what it takes to beat the 7.62x39 in terms of steel penetration. All of the steel used was ...Oct 25, 2020 ... The 5.56 had at least 500 FPS on the 300 Blackout for velocity, slightly decreased muzzle energy, a little less than half the bullet drop, and ...It is not like 223/556. 300 AAC is what the company AAC named after because of 300 whisper project. The correct name is .300 AAC Blackout. .300 Whisper is in most cases compatible will .300 AAC Blackout barrels and chambers. Yea 300 B0 stands for “black out” and 300AAC stands for “Advance Armament company.Jul 19, 2022 · .300 Blackout vs. 5.56 NATO Strengths & Weaknesses. Both .300 BLK and 5.56 NATO are intermediate-class rifle cartridges for target shooting, hunting, home defense, and plinking. The 5.56 is half the cost of 300 BLK and is available in more high-end loading suitable for precision rifle fire. The 300 Blackout has been optimized for maximum efficiency in a 9-inch barrel, making it very suitable for secret work in compact AR-15 SBRs. View Details at Brownells The official parent case is the Fireball .221, but you also can consider this case as a .223 one, which has been modified to accept .308 diameter projectiles.Yes, .300 Blackout ammunition can fit in a 5.56 magazine due to the similar dimensions of the cartridges. However, it is important to note that using a 5.56 magazine with .300 Blackout ammo may affect reliability and cause feeding issues, so it is generally recommended to use dedicated .300 Blackout magazines for optimal performance.Jan 6, 2024 · Learn the history, performance, and use of the .300 Blackout and the 5.56 NATO rounds, two of the most popular calibers for AR-15 style rifles and pistols. Compare their ballistic characteristics, terminal ballistics, and shortcomings in this article. Aug 9, 2021 ... Extra bonus: 300 AAC Blackout fits in regular .223/5.56 magazines as well. In short, it packs a wallop and makes a big hole. It also certainly ...WHICH IS YOUR FAVORITE???CMMG here: https://bit.ly/3cHkvMpPinty reflex site: https://amzn.to/2PY3WlxTruly appreciate you watching the videos!!!WTW shirts!!! ... Jul 13, 2023 · In today's video, we will be comparing the performance of the 5.56 NATO to the 300 Blackout on mild steel. These cartridges are very similar in length but ar... May 8, 2018 · Effective Range. Though the 5.56 has a greater range (500 yards compared to 300 yards), the .300 blk is more effective when it comes to hunting. Weight. The .300 BLK is filled with 110 to 220 grain bullets while the 5.56 sports 40 to 77 grain. This makes the 5.56 approximately 40% lighter than the .300. Availability. Well, you’ve done it. You’ve gone and eaten yourself into a food coma. Your belly feels stretched beyond capacity and you can barely move your limbs. The ideal solution is no doubt...The .300blk from a 9in barrel has basically identical terminal performance to a 5.56 from a 14in barrel, but gives up longer range (200y+) performance and accuracy, AND projectile selection to do that. But probably not identical terminal performance out of a similar length barrel. 5" ain't nothin'.Jan 6, 2024 · Learn the history, performance, and use of the .300 Blackout and the 5.56 NATO rounds, two of the most popular calibers for AR-15 style rifles and pistols. Compare their ballistic characteristics, terminal ballistics, and shortcomings in this article. Needs a 16" barrel to be a rifle. All AR15 lowers will work with both calibers. 300blk is just a 5.56 case that's been cut a little shorter with a 30 cal bullet in it. This is why everything on a 5.56 gun is interchangeable with 300blk except the …The AR-556® rifle with free-float handguard is now available chambered in .300 Blackout. This addition to the Ruger® AR-556 rifle line features a 16.10" cold hammer-forged barrel with a 1:7" twist and pistol-length gas system to reliably function with both the lightest supersonic hunting rounds and heavy, subsonic rounds.A 300 Blackout cartridge is, in essence, a reworked version of the earlier, non-standard 300 Whisper cartridge. 5.56mm, on the other hand, is based on the 223 Remington cartridge and shoots a .22 caliber bullet. 125 or 124 grains is a typical baseline bullet weight for 300 Blackout vs 5.56, which uses 55 grain bullets as a starting point. The most obvious difference between the 300 Blackout vs 223 Rem is the bullet diameter that each rifle cartridge fires. The 223 Remington fires a 0.224” diameter bullet while the 300 BLK uses a 0.308” diameter bullet. Both cartridges have the same overall length so they can fit in standard AR-15 mags.Learn the history, specs, and performance of the 300 Blackout and 5.56mm NATO rounds for the AR-15 platform. Compare their ballistics, velocity, accuracy, and suitability for …Muzzle blast will be much less on a 300blk. The majority of powders used on 300 are intended to be mostly burnt up within 8-9" and there is less powder in the cartridge anyway so there will be less gas an less powder being ejected out the muzzle producing the concussion. Posted: 7/6/2014 5:18:19 AM EST. [#14]Using 500 meters as a benchmark, a NATO standard 5.56x45mm M855 projectile fired at 2,900 FPS will have 100 inches of drop, 41 inches of drift, and 291 ft.-lbs. of energy at that distance. In contrast, a .300 Blackout 125 grain projectile at 2,220 FPS has: 100 inches drop at 440 meters. 41 inches drift at 484 meters. Learn the history, features, and performance of the 300 Blackout and the 5.56mm NATO rounds in this high-velocity AR-15 shootout. Find out which round is better for long-range, close-quarters, and suppression shooting, and how to convert your AR-15 to shoot them. Oct 29, 2021 ... 300 blackout lacks the longer-range capability of the 5.56mm, the heavier bullet means that, under 300 yards or so, the larger round hits harder ...The PMAG 30 AR 300 B GEN M3 is a purpose-designed magazine for rifles chambered in 300 Blackout® (300 BLK). Since its inception, 300 BLK shooters have had to use a magazine designed for another cartridge, limiting its ultimate performance and compatibility. One of the key features of 300 BLK is the compatibility with 5.56x45mm parts, but with ...
458 Socom vs 300 Blackout. The 458 Socom was designed in 2000 by Tony Rumore of Tromix Lead Delivery Systems. It is a rimless, bottlenecked cartridge that is based on the .50 Action Express case. The 458 Socom has a maximum case length of 0.990 inches and a diameter of 0.458 inches. It can shoot bullets weighing anywhere …. A hollow tree movie
The primary difference between 223 and 300 Blackout is the bullet diameter each rifle cartridge fires. The 223 Rem fires a 0.224” diameter bullet while the 300 ...Gun University’s Choices of the Best 300 Blackout Magazines. Best overall. Magpul PMAG 30 AR 300 B Gen M3, 300 BLK. Purpose built for 300 BLK. Polymer body. Distinct texture from 5.56 variant. Check Price. 2. Amend2 AR-15 30-round 300 BLK Mod-3.The .300 blk and .308 Win are fairly similar in pricing and can be found in a range of $1.25 to $2.50 per round. The .308 Win is a more popular round so you can have better deals. Additionally, the .308 Win has a ton of bullet options available for it, along with a lot of other information and data. With bullets upward of 150/154 grains, the 7.62x39 mm’s muzzle velocities best those of the .300 Blackout by more than 200 fps at times (especially with “hotter” foreign-made loads). However ...It's AR-15 vs AR-15! Today we test the 5.56 vs 300 Blackout on how well they can penetrate wood, concrete, and steel! Each of these calibers are good at what...Whereas the Blackout delivers a more barrier-blind terminal effect per round than the slighter 5.56 and carries both better terminal ballistics and more energy ...Aug 23, 2022 ... For $20 off your next ammo purchase, go to https://ammo.com/youtube (a special deal for our viewers)! The 5.56mm NATO round has been the ...Feb 9, 2023 · While going about 200 feet slower at 250 yards, the 300 Blackout has lost only a fourth of its speed and a little less than half of its total energy. By 500 yards 5.56 will have roughly a velocity of 1,210 fps with 179 ft-lbs of energy and 300 Blackout will be going at about 1,111 fps with 302 ft-lbs of energy. The 6.8 SPC and 300 BLK cartridges were designed for two very different jobs. 6.8 Remington SPC was designed to be a longer range cartridge, while 300 BLK (AKA 7.62×35) was designed to be a shorter range cartridge that works well suppressed. I interviewed Kevin Brittingham, founder of AAC (and godfather of the 300 BLK cartridge) …The heavier grain .300 AAC Blackout offers better ballistic performance and stopping power than the more popular 5.56 in subsonic AR setups. Since the case dimensions of the 5.56 and .300 AAC Blackout are almost the same, you can chamber most rifles with standard 5.56 parts with the .300 Blackout cartridge. Parts of a Bolt …Oct 25, 2020 · A comparison of the ballistics of 5.56 NATO and 300 Blackout, a 5.56 replacement cartridge with 7.62×39 capabilities. See how they perform in different barrel lengths, twist rates, velocities, and bullet types for supersonic and subsonic ammunition. Biggest reason was the performance out of a short barrel. As most people know the 300 blackout loses very little coming out of a 8.5-9.5" barrel where as the 5.56 is a much greater loss and relies more on its velocity than 300 blackout. The performance out of the short barrel allows for the pros over a longer rifle.May 7, 2020 ... CMMG here: https://bit.ly/3cHkvMp Pinty reflex site: https://amzn.to/2PY3Wlx Truly appreciate you watching the videos!!! WTW shirts!3 days ago · We dive into that in this blog by comparing the 300 blackout vs 556 NATO. 300 Blackout vs. 9mm Parabellum After 5.56 NATO, 9mm is one of the most popular calibers that are commonly used and actively sought after (especially during the pandemic). This is one of the newest and most revolutionary weapon and ammo configuration adopted by the US military. 300 blackout and the MCX weapon is a specialized t...300 Blackout or 223. Which one is your go-to AR15 caliber and why? Go to the comment section and let me know your thoughts! I would love to hear them!The Bes... May 7, 2020 ... CMMG here: https://bit.ly/3cHkvMp Pinty reflex site: https://amzn.to/2PY3Wlx Truly appreciate you watching the videos!!! WTW shirts!Just a random thought i had but could a 300 blackout suppressor work with a 5.56 rifle being a 300 blackout round is larger you shouldn't have to worry about the 5.56 round hitting the baffles. I guess the 5.56 with the 300 blackout suppressor wouldn't be as quiet as a 5.56 suppressor due to more gases escaping but it should work?Dec 10, 2012 ... I don't know much about the differences in the cartridges, but I would vote for 5.56 unless you reload. If you reload I would recommend the 300 ...The .300 Whisper can be fired from a .300 BLK rifle provided the correct ammunition is used. Additional standard comparisons of quality are as follows: Let's compare the rounds: 300 BLACKOUT vs. 5.56. The 300 BLK has a greater destructive potential than the 5.56 because it fires a more robust bullet..