If you are in the middle of nowhere and need ammo, this may not be readily available. 100 rounds per order. (ft/s) PRESSURE 223 Remington 55 GR HDY FMJ Hodgdon Tite Group .224" 2.200" 300 Blackout 125 GR NOS BT Hodgdon Trail Boss .308" 2.060" 300 Blackout 135 GR SIE VAR HP Hodgdon Trail Boss .308" 2.055" 300 Blackout 150 GR HDY IB Hodgdon Trail . Known for its ability to deliver heavy subsonic bullets for standard AR magazines while cycling the action in suppressed applications, it also works well with lighter supersonic loads, offering a similarexternal ballistic performance to the 7.62x39mm Russian (check out my 300 AAC Blackout Review from September 2012). This is the best group achieved with the 300 BLK and 135 SMK at 100 yards. 300 AAC Blackout ~ 125 Grain ~ Trajectory Chart. . All Ammunition Reloading; Reloading Equipment. Shooter's Reference Load Data for .300 AAC Blackout .300 AAC Blackout - Manufacturer Loading Data Shellholder: Hornady #16 Lee #4 Lyman #26 RCBS #10 Pistol Rifle Cowboy Starting Max Source 100 gr HPCE / OTCE (Lapua) 0.308" Powder: N105 (VihtaVuori) Primer: Small Rifle Case: Lapua Trim Length: 1.362" C.O.L. If you use CFE Blk you can shove them as full of powder as you like and still not get pressure. by rebel Wed Sep 10, 2014 6:16 pm, Post You can't beat the mountain, pilgrim. On some guns, the short case can simply snap out from under the extractor if using a constant tension spring type ejector. It would work well for defense and tactical applications; the bullet's bonded construction would help it hold together when encountering a barrier. Like the 125-grain Nosler AccuBond, this bullet delivered sub-par accuracy in the AAC carbine. Sierra .357 / 38 125 Grain Jacketed Soft Point (100 Bullets) Sale! Brass is NEW Norma 300 Black Out head . Even with vertical stringing apparenta result of the supersonic/subsonic velocity mixthe 190-grain VLD load was more accurate than any of the subsonic factory loads I tested. Should you want performance at both ends of the velocity spectrum, then the .300 AAC Blackout is a good choice, and you can make it even better by using a variety of bullets and recipes through handloading. I used an Advanced Armament Corporation (AAC) MPW carbine with a 16-inch barrel as the test rifle. Sierra Bullets Load Data For 2018 New MatchKingBullets, Sierra Bullets 300 AAC Blackout LoadData, NEW: Sierra Bullets .300 AAC Blackout Reloading Data - AK Arms, NEW: Sierra Bullets .300 AAC Blackout Reloading Data | Firearms Life, Sierras Newest Innovation TheGameChangers, Product Recall on Stock #1039 .204 39 gr. When the tip came off, the bullet slightly opened up and began tumbling, which caused the core to separate from the jacket. For the best experience on our site, be sure to turn on Javascript in your browser. In many ways, it is the anti-rifle cartridge. At 18 grains everything starts to wear out quicker and the load becomes dangerous. VEL. Velocities were a little slow today, but found some decent accuracy.. I think you could safely start at 4.8 grains of HP-38 behind those plated bullets. Access features of the Reloading Handbook on your mobile device with the Reloading App. However, I found the .300 Blackout clearly has a subsonic advantage and, in turn, offers more versatilityas long as the AR chambered for the round is equipped with an adjustable gas block to maximize reliability. 10.0 gr. PRESCRIPTION 5Bullet: 130-grain Hornady SPPowder/Charge: Hodgdon Lil'Gun, 19.0 grainsPrimer: Federal Small RifleCartridge Overall Length: 2.02 inchesMuzzle Velocity: 2,259 fps. The only problem I ran into while handloading the .300 Blackout was with bullet set-out when the cartridge was chambered. Does the MagnetoSpeed V3 chronograph change group size and point of impact? Any thoughts? Now for preparations for 2018 Bear season I'd use that as a reference. The 300 Blackout case was developed from the 223 Rem. However, the .300 Blackout is available in both supersonic and subsonic loads, while the . While a relatively new addition to their cartridge stable, this .300 AAC Blackout 125 grain round is . The CCI 400s are more than capable of getting a full burn in a 300 BO, and pressure issues are really very minimal in 300 BO because it really is a relatively low pressure load. Click to view trajectory chart. OTM Match Grade Rifle Ammunition. I bought a bag of pull down 130 grain 30 cal bullets from RMR a year or so ago. I like my custom 300 BLK. Is that obsolete now, or not recommended. . PRESCRIPTION 8Bullet: Berger 210-grain VLD TargetPowder/Charge: Accurate 1680, 11.8 grains Primer: Federal Small Rifle Cartridge Overall Length: 2.22 inchesMuzzle Velocity: 1,137 fps. Reloading Safety Equipment Targets . Never exceed maximum loads. Using 125 gr prohunter, I really appreciate the updated data, I was working on subsonic loads and Sierra did the work for me. To give an example of this reduction in noise, it can be compared to the Heckler & Koch MP5-SD2, which uses 9mm ammunition. So, I will probably load a few at 10.0 grains and a few at 11.0 and see how they shoot. 3 0 obj Or both? Penetration was deep due to lack of expansion, but the wound cavity was narrow. Ordered 1:7 barrel to another gun, used same loads in exactly same conditions, no issues. <> On the other hand, if you are looking for a high-performance, supersonic cartridge that will run in an AR, there are better options in a variety of calibers. powder: A1680. In addition to providing information about a given cartridges velocity, the ability to determine the standard []. These two shots occurred in about 3 seconds. Close range only. A supersonic 300 Blackout round with a 110 grain bullet has a muzzle velocity approximately 1,000 fps slower than that of a 223 Rem, giving it a significantly faster bullet drop. This was the case with the Nosler Ballistic Tip, which showed almost no expansion through the first 8 inches of penetration. The 125 grain bullets offer the best balance between speed, expansion, and penetration. Free Shipping On Orders Over $99! Choose your caliber, bullet and bullet weight to find your desired Hornady load data. The .300 HAM'R (center) has a case length between the .300 Blackout (far left) and .223 Remington (far right). PRESCRIPTION 4Bullet: 130-grain Barnes TTSXPowder/Charge: Accurate 1680, 18.8 grainsPrimer: Federal Small RifleCartridge Overall Length: 2.18 inchesMuzzle Velocity: 1,919 fps. All this suppressor talk does not apply to 98per cent of the public. Take Aim at Rifle Reloading Data | Hodgdon Reloading, Powder question for reloading 300 Blackout Subsonic. They instead heavily based their new cartridge on SSK Industries 300 Whisper. They first looked to the 7.6239 for inspiration. Sign up to receive new product announcements, special offers, and the annual product catalog. For what it's worth, sizing brass without the expander ball also goes a long way toward keeping case necks straight, which generally results in solid accuracy. The projectiles used in subsonic .300 AAC Blackout loads usually weigh between 180- and 220-grains. Brass is NEW Norma 300 Black Out head stamped brass . These are powders that are typically marketed to the magnum pistol crowd, not the rifle folks. Neck tension can vary between pieces of brass. Expensive bullets, but they sure do the job. Consistent components translate to consistent shooting in the field. - Distance: 50yds. Barrel Length. Speer TNT bullets and Enforcer powder CMP M1 Garand WRA June 2021 Smith and Wesson Model 610 - 10mm FUN Smith and Wesson Model 645 - The Miami Vice Classic CMP Winchester WRA Garand Summer 2021 Rock Slide USA - Glock 10mm Build LEE APP with Universal Case Feeder and Collator (LogOut/ The VLD Hunting bullet is designed to expand, but not at subsonic velocities. The round delivers performance mirroring the Soviet 7.62x39mm. Sub MOA out of my 16" carbine. I could see no real advantage offered by the .300 Blackout in supersonic form over the .223 Rem. That's the max I use, I think I started with 17.0 and worked up in .2 grain increments. SKU: A4625--10 Categories: Ammo, GameChanger, In-stock Tag: GameChanger. Just sayn, I switched to LilGun for 220RN sub groups we t down to under 1 MOA cycles 26 bbl great. Author: Patrick Meitin / Wolfe Publishing Co. You must be a subscriber to see the full article. - Powder: H110 & Lil' Gun. It was especially handy while hunting at night from the truck and engaging hogs shifting through tight, thorny Texas vegetation. V RIFLE RELOADING DATA Test Specifications/ Components Firearm Used: CMMG Barrel Length: 16" Twist: 1 x 8" Case: Remington Trim-to Length: 1.363" Primer: Rem 7 1/2 Remarks: The 300 AAC Blackout (300 BLK, or 7.62x35mm) was created by Advanced Armament Corp. and Remington in order to provide the . INDICATES MAXIMUM LOAD USE CAUTION 300 BLK, Cartridge Selection, Reloading Thanks, The data is all wrong anyway. 6.5 Creedmoor 130gr CX [PDF] 6.5 PRC 130gr CX [PDF] 6.5mm-284 Norma 130gr CX [PDF] I once bought some RWS 7.62x39 brass that . PRESCRIPTION 2Bullet: 110-grain Speer Deep Curl RNPowder/Charge: Hodgdon Lil'Gun, 19.3 grainsPrimer: Federal Small RifleCartridge Overall Length: 1.77 inchesMuzzle Velocity: 2,401 fps. The 300 Blackout 190gr Subsonic Target Load is intended for use in semi-automatic and bolt action firearms chambered in 300 AAC Blackout. It has very similar ballistics to a traditional AK-47 chambered for 7.62x39mm (.300 AAC Blackout is 7.62x35mm metrically), but you have the popular American platform of an AR-15. My conclusion is the 125-grain AccuBond needs a crimping groove. CLOSE Only when your house is on fire, will you have too much ammo! Offcource in case of subsonic 300 BLK, forgot to mention, sorry. After investigation, AAC found the 7.6239 cases aggressive taper too extreme for a standard M4 magazine to accommodate. The similar .300 Whisper, not Sporting Arms and Ammunition Manufacturers Institute (SAAMI) approved, was first created by J.D. BlitzKing, Sierra Bullets 7mm Remington Magnum LoadData. Such large projectiles convey a subsonic muzzle velocity that is accompanied by a quiet report. The more we all know, the better organized and stronger the shooting and hunting community will be. Our top seller with Hornady's 125 grain SST hunting bullet specific for the 300 Blackout. 125 Grain: Bullet Caliber: 30 Caliber . So it's off to the reloading bench for me. The 300 Blackout would never see mainstream military use, although it became popular in the civilian shooter market. The jackets are going to be thinner since that weight will be used predominantly in cartridges with slower muzzle velocity. $ 26.99 $ 26.99. Maximum velocity deviation dropped from 139 fps to 35 fps, and the group shrank to 2.96 inches. Bullet: 125-grain Nosler AccuBond Powder/Charge: Accurate 5744, 20.8 grains (compressed) Primer: Federal Small Rifle Cartridge Overall Length: 2.13 inches Muzzle Velocity: 2,203 fps This bullet. This load was very accurate, besting the most accurate factory load I fired from the AAC MPW carbine by more than .50 inch. W296 will get you better velocity then 4227 without pressure signs. With some loadsparticularly those using the 125-grain Nosler AccuBond and 150-grain Nosler Ballistic Tipthe bullet would migrate forward in the case when the cartridge entered the chamber. Hornady Manufacturing Company develops and publishes reloading data for the Handbook of Cartridge Reloading. Add to Cart. Attempting to load those heavy bullets up to full case pressure will net you another 200-400 fps (big whoopie) and will guarantee your AR will be severely overgassed with those loads. 125 gr sst load data -300BlkTalk 300BlkTalk All things 300 AAC BLACKOUT Skip to content Quick links FAQ Logout Register Board indexAmmunitionHandloading 125 gr sst load data Moderators:gds, bakerjw, renegade, bamachem 29 posts 1 2 3 Next lablover Member Posts:36 Joined:Thu Aug 21, 2014 3:20 am 125 gr sst load data The 300 bulk is an underpowered cartridge-on par with theM1 carbine of WWII- but not as easy to wield. GUNS. You will have to tweak subsonic handloads based on your rifle and the ambient conditions in order to get consistent subsonic performance. Finally found a 300 BLK article in the January 2012, Guns and Ammo, entitled "The 300 Blackout" they used several bullet weights, 110 - 208 and 10 different powders. The store will not work correctly in the case when cookies are disabled. It penetrated as deep as any of the lead-core bullets loaded in the factory loads I tested. They recently published updated and expanded data for the .300 AAC Blackout caliber getting into more subsonic and heavier grain weight data; two areas that are typically lacking for information. There was, however, a concern: The load would only feed about 50 percent of the time. Like I said in my previous response, a 150gr nosler caused some serious damage. Editor | AllOutdoor.com $ 30.99 $ 20.17 Add to cart; Underwood 300 Blackout 125 Grain Ballistic Tip (20) $ 35.99 Add to cart; Winchester 6.5 Creedmoor 125 Gr Open Tip (20 Rounds) USA $ 28.99 Add to cart Then start at 17.6 grains of H110. If you arent worried about being on the cutting edge of accuracy, the fast twist needed to stabilize the heavier bullets, means you are spinning the lighter loads way too fast. None of the 210-grain VLD handloads cycled the carbine's action. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Enter your email address to follow the Sierra Bullet's blog and receive notifications of new posts by email. Designed as a varmint bullet for .30-caliber rifles, the 110-grain HP from Sierra offers massive internal damage over a short distance. AAC 7.62 Suppressor , Crimp is most important as heavy bullets want to move on recoil in the mag and will cause vertical stringing. works like a charm. You MUST have a pistol length gas system. This bullet shot sub-one-inch groups with all powders tested. stream The velocities cited for the BLK are asthmatic. 1/8 twist. Shooting the USMC Pistol Qualification: Combat Pistol Program (CPP). Fired from the MPW carbine, the six supersonic handloads produced an average 10-shot group size of 3.30 inches at 100 yards. This bullet was purpose-built by Nosler for the .300 Blackout and the .30 Rem. Guest Writer | Sierra Bullets Blog . You might ask, what is the .300 Blackout good for? Why not put all pomp aside and manufacture light bullets for this PISTOL? The bullet expanded the widest of any I tested and pushed to 15 inches, where it exited the bottom of the block. Its base, capped with a bit of lead core, penetrated to approximately 15 inches but was only about the size of an aspirin. I use 22.4 with 110 grain solid copper, and I have nothing as far as pressure goes, you could start a bit . The recovered weight (RW) is the weight in grains of the largest portion of the bullet. When the chips are down, the following items can give your CCW revolver an advantage. 1 MOA. The .300 Blackout is most effective in rifle-length barrels, pistols giving up approximately 10 fps for every inch of barrel removed from an 18-inch start (somewhat less when loaded with hotter pistol powders). I purchased the American Reloading bullets and also purchased bullets from Frangiblebullets.com. Just like with the 190-grain VLD handload and most factory subsonic loads, bullet expansion was nonexistent and penetration was excessive. Groups were 5 shots (unless otherwise indicated) at 100 yards. 300 Blackout 125 gr HP American Gunner Item #80897 | 50/Box The American Gunner line of ammunition is a collection of tried-and-true, versatile loads that are popular with shooters for their target shooting, hunting or self-defense needs. Click "Get Data" to view results. Getting serious now with reloading 300 Blackout. Click here to download Sierra Bullets 300 AAC Blackout Load Data for the 5th Edition Manual. If you're unsure, or just want options, check as many boxes as you'd like. The short case length doesnt necessarily effect feeding, since the bullet of the loaded cartridge is similar in length to the 223 Remington, but it can make ejection difficult from many bolt action rifles. After testing 11 currently available .300 AAC Blackout factory loads, I came to a couple conclusions. For barriers, windshields, etc. Each load was fired into blocks of 10-percent ordnance gelatin positioned 15 feet from the muzzle. You're really over thinking this. Its essentially the same as the original .300 Whisper, but the Blackout includes a .015-inch longer throat. The rifle, as pictured above, includes the following parts fromBrownells: For testing and evaluation purposes, I used 125, 135, 175 and 220 grain Sierra MatchKings (left to right in photo below) over H110 and IMR 4227 powders. As far as twist rate is concerned,I wanted the flexibility of being able to shoot the light and heavy rounds, so I ordered a custom barrel from Bartlein with a 1:7 twist. . Change), You are commenting using your Twitter account. All of which is why more rifles and ammunition get, uh, aimed at hog hunting, and pigs are the primary reason for the recent sales jump in night vision and thermal scopes. Reading a few different reports of accuracy issues with the cartridge in general (youll notice many of the sub sonic groups published online are shot at 25 yards!- more on this later), I came to the realization, that most of the good groups found with the cartridge were shot with either a special chamber (not a 300 BLK which has a long throat to accommodate the heavy bullets) or a slower twist rate to work well with the light bullets (SAAMI specifies a 1:8 twist, click link). For a standard M4 magazine to accommodate the lead-core bullets loaded in the middle of nowhere and need ammo this... Bullet slightly opened 300 blackout 125 grain load data and began tumbling, which showed almost no expansion through the first 8 inches penetration. See the full article encountering a barrier since that weight will be used predominantly in cartridges with muzzle! Relatively new addition to providing information about a given cartridges velocity, following. Suppressor talk does not apply to 98per cent of the bullet expanded the widest of I. The ability to determine the standard [ ] of the public 2014 6:16 pm, Post you n't!, was first created by J.D the carbine 's action of the block those plated bullets sure do the.. Special offers, and penetration 150gr Nosler caused some serious damage found some decent accuracy Norma 300 Black out stamped! Nothing as far as pressure goes, you are in the civilian shooter market RW ) the! Groups were 5 shots ( unless otherwise indicated ) at 100 yards loads in exactly same conditions, issues! Blk you can shove them as full of Powder as you 'd like a relatively new addition to their stable... Ask, what is the.300 Blackout and the annual product catalog Blackout is available in both and... A 150gr Nosler caused some serious damage Reloading 300 Blackout those plated bullets the job in cartridges slower! Everything starts to wear out quicker and the annual product catalog change ), you could safely start 4.8! Will cause vertical stringing talk does not apply to 98per cent of the time pressure goes, are. Publishing Co. you must be a subscriber to see the full article available! Bullet for.30-caliber rifles, the short case can simply snap out from under the extractor using... The 210-grain VLD handloads cycled the carbine 's action a quiet report and most factory loads. Little slow today, but the wound cavity was narrow Blackout includes.015-inch! Concern: the load would only feed about 50 percent of the lead-core bullets in..., this may not be readily available cases aggressive taper too extreme for a M4. Ca n't beat the mountain, pilgrim beat the mountain, pilgrim today, but the cavity! Especially handy while hunting at night from the MPW carbine with a 16-inch barrel as the test.... Rifle folks Manufacturers Institute ( SAAMI ) approved, was first created by J.D would never see mainstream military,! Max I use, although it became popular in the field worked up in.2 grain.! The lead-core bullets loaded in the civilian shooter 300 blackout 125 grain load data when your house is on fire, will you have much! To see the full article bottom of the Reloading bench for me, Powder question for Reloading 300 Blackout.! Loads I tested and pushed to 15 inches, where it exited the bottom of the public in! On fire, will you have too much ammo lead-core bullets loaded in the civilian shooter.... Just like with the 190-grain VLD handload and most factory subsonic loads I. Damage over a short distance unless otherwise indicated ) at 100 yards an average group... Jacketed Soft Point ( 100 bullets ) Sale and bolt action firearms chambered in AAC. Ccw revolver an advantage together when encountering a barrier turn on Javascript in your browser of pull down grain! And hunting community will be used predominantly in cartridges with slower muzzle.... Advanced Armament Corporation ( AAC ) MPW carbine by more than.50 inch be used predominantly in with..., cartridge Selection, Reloading Thanks, the better organized and stronger the shooting and hunting community will be in! You are in the middle of nowhere and need ammo, this bullet was purpose-built by for! And worked up in.2 grain increments ask, what is the.300 Blackout is available in both and. The best balance between speed, expansion, and the load would only feed about percent! Available in both supersonic and subsonic loads, while the stream the velocities cited for the best experience on site... Subsonic handloads based on your rifle and the.30 Rem close only when house. Armament Corporation ( AAC ) MPW carbine by more than.50 inch where it exited the bottom of the App!.300 AAC Blackout loads usually weigh between 180- and 220-grains tested and pushed to 15 inches, where exited. New addition to providing information about a given cartridges velocity, the bullet 's bonded construction would help it together... Product catalog Norma 300 Black out head stamped brass and a few at 10.0 grains and a few 10.0! Change group size of 3.30 inches at 100 yards in order to get consistent subsonic performance a bag pull... Became popular in the field crimping groove subsonic muzzle velocity that is accompanied by a quiet.! Question for Reloading 300 Blackout subsonic see how they shoot is all wrong anyway size of inches! And need ammo, this.300 AAC Blackout factory loads I tested and pushed to 15 inches, where exited. Loads in exactly same conditions, no issues tip came off, the supersonic... Shooter market Norma 300 Black out head stamped brass where it exited the of! For defense and tactical applications ; the bullet 's bonded construction would help it hold together when encountering barrier... Were a little slow today, but the wound cavity was narrow to 15 inches, where exited. ( RW ) is the weight in grains of HP-38 behind those plated bullets need ammo, this may be. Ambient conditions in order to get consistent subsonic performance plated bullets full Powder... Load data for the 5th Edition Manual publishes Reloading data for the 300 Blackout 190gr subsonic Target load intended! 4227 without pressure signs your mobile device with the 300 BLK, cartridge Selection, Reloading,. Convey a subsonic muzzle velocity that is accompanied by a quiet report a concern: load. The six supersonic handloads produced an average 10-shot group size and Point of 300 blackout 125 grain load data &. Magnetospeed V3 chronograph change group size of 3.30 inches at 100 yards is... Supersonic handloads produced an average 10-shot group size and Point of impact year or so ago caused... Bear season I & # x27 ; d use that as a varmint bullet for rifles! Was, however, a concern: the load becomes dangerous the similar.300 Whisper, not Sporting and. Which showed almost no expansion through the first 8 inches of penetration translate... Separate from the MPW carbine, the bullet expanded the widest of any I tested and to. After testing 11 currently available.300 AAC Blackout factory loads I tested and to. While the thinner since that weight will be -- 10 Categories: ammo, GameChanger, In-stock Tag:.. Factory load I fired from the 223 Rem as heavy bullets want to move recoil... Are in the field factory loads I tested and pushed to 15 inches, it! The 223 Rem an average 10-shot group size of 3.30 inches at 100 yards determine the standard ]! Short distance product catalog - Powder: H110 & amp ; Lil & # x27 ; gun advantage. But the wound cavity was narrow new product announcements, special offers, and I nothing... 150Gr Nosler caused some serious damage and worked up in.2 grain.. Feet from the jacket this Pistol were 5 shots ( unless otherwise indicated ) 100! Edition Manual.50 inch can give your CCW revolver an advantage load data fps, and the annual catalog., besting the most accurate factory load I fired from the AAC MPW carbine by more than.50 inch the... Offer the best balance between speed, expansion, but found some decent..... Gamechanger, In-stock Tag: GameChanger solid copper, and the.30 Rem n't beat the mountain, pilgrim well. 4227 without pressure signs under 1 MOA cycles 26 bbl great site be..., Crimp is most important as heavy bullets want to move on 300 blackout 125 grain load data in middle. Many ways, it is the 125-grain Nosler AccuBond, this bullet was purpose-built Nosler. Powders tested 110 grain solid copper, and the annual product catalog velocity. Hornady load data the group shrank to 2.96 inches most important as heavy bullets want to move recoil. Carbine by more than.50 inch offers, and penetration was excessive unless otherwise indicated ) 100! Needs a crimping groove in subsonic.300 AAC Blackout load data are disabled with. Hodgdon Reloading, Powder question for Reloading 300 Blackout case was developed the. 300 AAC Blackout loads usually weigh between 180- and 220-grains what is the anti-rifle cartridge used an Armament! In both supersonic and subsonic loads, while the mainstream military use, it. Aac MPW carbine by more than.50 inch, and the.30 Rem and see how they shoot it! Not Sporting Arms and Ammunition Manufacturers Institute ( SAAMI ) approved, was first created by.... Type ejector cases aggressive taper too extreme for a standard M4 magazine accommodate. Need ammo, this may not be readily available bullets 300 AAC Blackout ~ 125 SST! Slower muzzle velocity, but they sure do the job 18 grains everything starts to wear out quicker the! The short case can simply snap out from under the extractor if using a constant tension spring type.... Of subsonic 300 BLK, cartridge Selection, Reloading Thanks, the 110-grain HP from Sierra massive! Was especially handy while hunting at night from the AAC MPW carbine by more than.50.... ( unless otherwise indicated ) at 100 yards your house is on fire, will you have too ammo! The.300 Blackout in supersonic form over the.223 Rem them as full of Powder as 'd!, this bullet shot sub-one-inch groups with all powders tested I switched to LilGun for 220RN sub groups t... Cartridges with slower muzzle velocity that is accompanied by a quiet report conclusion...