Yet another .300 Blackout disaster. Unfortunately, that .300 Blackout cartridge can fit in a .223 Rem chamber. Shooting a .308-caliber bullet in .223 bore is a recipe for disaster.
The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
This images were provided by Tactical Rifle Shooters on Facebook. The message was clear: “Don’t try to run 300 Blackout in your .223/5.56mm. It won’t end well. The problem is identical rifles and identical magazines but different calibers.”
Image from Accurate Shooter Forum. Cutaway shows the jammed .30-Cal bullet:
For those who MUST have a .300 Blackout, here are some things you can do:
1. Use different colored magazines for .300 Blackout vs. .223 Rem.
2. Fit all your uppers with caliber-labeled ejection port covers.
3. Mark .223 Rem upper handguards with the caliber in bright paint.
4. Mark all .300 BLK Rounds with heavy black marker.
Comments by Folks Who Viewed these .300 Blackout Disaster Photos:
“The .300 Blackout is simply a badly-designed round. A properly-designed round would have had a feature in the shape that would have prevented cross loading in the first place.” — D. Santiago
“I almost made that mistake… I had a magazine of 300 BLK inserted in my .223/5.56 all night. Fortunately, I never pulled the trigger. Once I realized the mistake, I almost got ill. [After that incident] I no longer own a 300 BLK.” — B. Welch
“Happened to me hog hunting from a helo. Gun exploded in my face.” — B. Hood
“Fire-forming projectiles [is] so wrong in centerfire!” — M. Stres
“Had some dude come into the store the other day wanting .300 Blackout ammo to shoot in his 5.56 AR. It took 15 minutes of explaining for him to understand you got to have a .300 Blackout Upper!” — R. Williams
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Photos and Facebook post by Tactical Rifle Shooters
Yet another .300 Blackout disaster. Unfortunately, that .300 Blackout cartridge can fit in a .223 Rem chamber. Shooting a .308-caliber bullet in .223 bore is a recipe for disaster.
The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
This images were provided by Tactical Rifle Shooters on Facebook. The message was clear: “Don’t try to run 300 Blackout in your .223/5.56mm. It won’t end well. The problem is identical rifles and identical magazines but different calibers.”
Image from Accurate Shooter Forum. Cutaway shows the jammed .30-Cal bullet:
For those who MUST have a .300 Blackout, here are some things you can do:
1. Use different colored magazines for .300 Blackout vs. .223 Rem.
2. Fit all your uppers with caliber-labeled ejection port covers.
3. Mark .223 Rem upper handguards with the caliber in bright paint.
4. Mark all .300 BLK Rounds with heavy black marker.
Comments by Folks Who Viewed these .300 Blackout Disaster Photos:
“The .300 Blackout is simply a badly-designed round. A properly-designed round would have had a feature in the shape that would have prevented cross loading in the first place.” — D. Santiago
“I almost made that mistake… I had a magazine of 300 BLK inserted in my .223/5.56 all night. Fortunately, I never pulled the trigger. Once I realized the mistake, I almost got ill. [After that incident] I no longer own a 300 BLK.” — B. Welch
“Happened to me hog hunting from a helo. Gun exploded in my face.” — B. Hood
“Fire-forming projectiles [is] so wrong in centerfire!” — M. Stres
“Had some dude come into the store the other day wanting .300 Blackout ammo to shoot in his 5.56 AR. It took 15 minutes of explaining for him to understand you got to have a .300 Blackout Upper!” — R. Williams
Share the post ".300 Blackout Fired in .223 Rem — Mistake Is Disasterous"
Yet another .300 Blackout disaster. Unfortunately, that .300 Blackout cartridge can fit in a .223 Rem chamber. Shooting a .308-caliber bullet in .223 bore is a recipe for disaster.
The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
This images were provided by Tactical Rifle Shooters on Facebook. The message was clear: “Don’t try to run 300 Blackout in your .223/5.56mm. It won’t end well. The problem is identical rifles and identical magazines but different calibers.”
For those who MUST have a .300 Blackout, here are some things you can do:
1. Use different colored magazines for .300 Blackout vs. .223 Rem.
2. Fit all your uppers with caliber-labeled ejection port covers.
3. Mark .223 Rem upper handguards with the caliber in bright paint.
4. Mark all .300 BLK Rounds with heavy black marker.
Comments by Folks Who Viewed these .300 Blackout Disaster Photos:
“The .300 Blackout is simply a badly-designed round. A properly-designed round would have had a feature in the shape that would have prevented cross loading in the first place.” — D. Santiago
“I almost made that mistake… I had a magazine of 300 BLK inserted in my .223/5.56 all night. Fortunately, I never pulled the trigger. Once I realized the mistake, I almost got ill. [After that incident] I no longer own a 300 BLK.” — B. Welch
“Happened to me hog hunting from a helo. Gun exploded in my face.” — B. Hood
“Fire-forming projectiles [is] so wrong in centerfire!” — M. Stres
“Had some dude come into the store the other day wanting .300 Blackout ammo to shoot in his 5.56 AR. It took 15 minutes of explaining for him to understand you got to have a .300 Blackout Upper!” — R. Williams
Share the post "Scary Stuff — .300 Blackout Fired in a .223 Rem Barrel"
As the .30-Cal cartridge of choice for the AR15 platform, the 300 AAC Blackout, also known as 300 BLK, has become quite popular with black rifle owners. You can now purchase quality factory ammo and even premium Lapua 300 BLK brass. Some folks wonder — “why consider a 300 BLK”? Here are the key reasons you may want to acquire a 300 AAC Blackout upper for your AR:
FIVE REASONS to Shoot the 300 BLK:
1. Easy Conversion: Use your current AR lower, bolt/carrier, buffer, and magazine. The only part you need to change is the barrel. 2. Hunting Capability: 300 BLK conforms to state hunting regulations which may require a cartridge larger than .22 caliber. The 300 BLK shoots .308 caliber bullets. 3. Suppressor-Friendly: You can shoot heavier bullets subsonic. The subsonic capabilities of the 300 BLK make it ideal for use with a suppressed AR. 4. Great Barrel Life: With a .30-caliber bore and a modest powder charge, barrel life is outstanding. 5. Great Brass: No Case forming is required — just buy Lapua 300 BLK brass.
The 300 AAC Blackout was created by Advanced Armament Corp. and Remington primarily for the military as a way to shoot .30-caliber bullets from the M4/AR15 platform while using standard magazines. As explained by Robert Silvers, AAC’s R&D Director: “[You can] shoot 30 caliber from your AR while still using normal magazines with full capacity. Even the bolt stays the same, and all that changes is the barrel.” CLICK HERE for more information.
The concept of putting a .30-caliber bullet in a shortened 223 case has been done before, but not as an industry-wide standard that anyone can make products for, royalty-free. SAAMI, the industry standards organization, adopted and standardized the AAC 300 Blackout earlier this year. The SAAMI diagram for the 300 BLK is shown below.
Affordable Factory 300 BLK Ammo is Available
Remington now sells a variety of 300 BLK ammo: 1) 125 grain open-tip match with a custom Sierra bullet; 2) 220gr subsonic, and 3) 125gr AccuTip (photo below). While the 300 BLK is easy (and inexpensive) to reload, Remington and AAC recognized that most people are not reloaders. So Remington will be budget-priced UMC-brand 300 BLK ammo through at just $12.99 per box — that’s less than most other rifle cartridges than are more powerful than the .223.
The 300 AAC Blackout definitely works for hunters who want to use their AR15-platform rifle. And it also serves as a specialized 30-Cal “rule-beater” that lets 3-Gun competitors “make major” with a low-recoil cartridge that also offers long barrel life. For those who need to run a .30-caliber cartridge from a standard AR15 platform (as opposed to the AR10), the 300 AAC Blackout makes sense. But for hunters using a bolt gun, there are any number of tried and true options, such as the 7.62×39, .30-30, and, of course, the .308 Winchester (7.62×51 NATO).
WARNING: With some bullet options (and setback during chambering) 300 Blackout rounds will go into a .223 chamber and fire. Putting a .308-caliber bullet in a .224-diameter barrel is a recipe for disaster. You can blow up your gun and sustain serious injury. That’s why we recommend you have a dedicated 300 BLK upper and mark your magazines. Also, always, always check your .223 magazines to ensure no 300 BLK rounds worked their way in when you loaded the mags. There have been a number of Kabooms recorded from 300 BLK rounds fired in a .223 Rem/5.56×45 chamber. CLICK HERE to see actual 300 BLK in .223 Rem chamber.
In her latest video, Kirsten Joy Weiss shows off the 300 AAC Blackout, a popular .30-caliber cartridge for AR-platform rifles. Kirsten explains the advantages for the 300 BLK for hunters as well as those using an AR for self-defense. The 300 BLK is popular with suppressor owners because it works well with heavy bullets launched at subsonic velocities.
Reasons to Shoot a 300 AAC Blackout:
— You can use your current AR Bolt, Bolt Carrier, Buffer, and Magazine. The only part you need to change is the barrel.
— 300 BLK conforms to state hunting regulations which may require a cartridge larger than .22 Caliber. The 300 BLK shoots .308 caliber bullets.
— Lapua now sells 300 AAC Blackout brass so no case-forming is required. Just load and shoot.
— You can shoot light bullets supersonic or heavier bullets subsonic. The subsonic capabilities of the 300 BLK make it ideal for use with a suppressed AR.
— With a .30-caliber bore and a modest powder charge, barrel life is outstanding with the 300 BLK.
— You can make 300 BLK cartridges from fired .223 Rem brass, which is plentiful and cheap.
— The .300 BLK performs well with some very accurate powders, such as Hodgdon H4198 and IMR 4227.
The 300 AAC Blackout was created by Advanced Armament Corp. and Remington primarily for the military as a way to shoot .30-caliber bullets from the M4/AR15 platform while using standard magazines. As explained by Robert Silvers, AAC’s R&D Director: “Now there is a way to shoot 30 caliber from your AR while still using normal magazines with full capacity. Even the bolt stays the same, and all that changes is the barrel.” For more information visit www.300aacblackout.com and download the 300 BLK Cartridge Information Guide (PDF).
SAAMI, the industry standards organization, adopted and standardized the AAC 300 Blackout in 2010. The SAAMI diagram for the 300 BLK is shown above. Lapua now makes 300 BLK cartridge brass.
300 BLK for 3-Gun Competition
The 300 AAC Blackout has been touted as an important new hunting round, but we see it more as a specialized “rule-beater” 30-cal option that lets 3-Gun competitors “make major” with a low-recoil cartridge that also offers long barrel life. For those who need to run a .30-caliber cartridge from a standard AR15 platform (as opposed to the AR10), the 300 AAC Blackout makes some sense. But for hunters using a bolt gun, there are any number of tried and true options, such as the 7.62×39, .30-30, and, of course, the .308 Winchester (7.62×51 NATO).
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At the request of our readers, we provide select “Deals of the Week”. Every Monday morning we offer our Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
Here’s a rifle with a smooth three-lug action and good trigger that can take any game in North America. The Browning A-Bolt is justifiably respected as a solid hunting rifle. The 300 Winchester Magnum chambering offers serious hitting power, even at long range. This rifle, with a blued barreled action, normally retails for $600.00+. Now it’s on sale for under $500.00. What’s more Browning will pay the sales tax (up to 8%). That’s right, Browning is currently offering a Sales Tax Rebate for any Browning firearm purchased before April 30, 2016. That will save you forty bucks in states with 8% sales tax.
2. Brownells.com — AR15 Stripped Lower, $59.99
This small pin lower receiver is precision-machined from a 7075 T6 aluminum forging. This versatile, mil-spec lower can be the foundation for rifle builds on 5.56/.223, 6.5mm, 6.8mm, 300 AAC Blackout or other chamberings. Holes, inletting and pin locations have been cut to final dimensions and accept standard AR-15 magazines and components. Right now this Aero Precision lower is on sale at Brownells for just $59.99.
3. Midsouth — Lyman BoreCam Digital Borescope, $222.46
Note: We are repeating this special (first listed last week) because it is the best deal we’ve found on an excellent product in high demand. The Lyman BoreCam is an electro-optical borescope with a digital display. You can record “stills” on a SD card. This is one of the hottest products on the market right now — so hot that it has been back-ordered at most vencdore. But we found some in stock at a great price. Midsouth Shooters Supply now has the BoreCam for $222.46. Grab it while you can at that price. Other online vendors are charging a LOT more (e.g. MidwayUSA price is $259.99).
4. BassPro Shops — Federal .22LR Target Ammo, $4.79/50 Rounds
This Federal Gold Medal Target ammo is MUCH better than common bulk rimfire ammo, yet with this deal, it is only 9.6 cents per round. That’s cheaper than most other .22 LR ammo that’s anywhere near as good. This special is available now from Bass Pro Shops webstore. In addition, Bass Pro is currently offering Free Shipping on orders over $50.00.
Like the RCBS ChargeMaster, this Lyman Gen6 Powder System will automatically dispense and weigh powder charges. This unit features a touch screen, rapid warm-up, anti-static/anti-drift technology, and electronic shielding to resist interference from other electronic devices. It’s a good deal at $205.99.
6. Midsouth — Lyman Bleacher Loading Blocks
Lyman’s new Bleacher Block stepped cartridge holders are great. Use the different levels for sorting brass. Or, migrate the brass from top to bottom as you proceed through case prep stages. Made of durable polymer, Bleacher Blocks are molded in three sizes. The smallest size (with 0.388″-diam holes) fits .223 Rem-size case heads. The middle size (with 0.485″-diam holes) fits .308 Win-size case heads. The biggest Bleacher Block has 0.565″-diameter recesses for magnum-size cases. All three cartridge block sizes hold fifty (50) rounds. Purchase any size for just $5.90 per Block at Midsouth.
7. Monmouth Reloading — 1000 Lake City 5.56 Cases, $68.95
1000 pieces of Lake City brass for under seventy bucks? Yep, that’s a deal and a half. Monmouth Reloading is selling genuine, once-fired Lake City 5.56x45mm brass, thick-walled and sourced direct from the U.S. Military. Monmouth reports: “Our current stock of Lake City 5.56 looks to be all newer year Lake City head stamp but may contain a small percentage of other NATO headstamps. Lake City is a popular, reliable brass, normally capable of many reloads.” Monmouth includes 1% overage to account for any damaged brass. NOTE: Brass has crimped primers, so the pockets will need to be reamed or swaged prior to reloading.
8. Amazon — Leight MAX NRR33 Earplugs, $7.58 for 50 Pairs.
These Howard Leight NRR33 Max plugs are your Editor’s favorite foam earplugs. Between shooting, motorcycling and mowing lawns, I probably have Max plugs in my ears 2-3 days a week. This is a very good price for a bulk pack of 50 pairs. And if you act soon, you can get free shipping to boot.
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At the request of our readers, we have launched a “Deals of the Week” feature. Every Monday morning we offer our Bargain selections. Here are some of the best deals on hardware, reloading components, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
1. RCBS — Buy Green, Get Green Rebate
RCBS is running a very attractive Rebate Program currently. If you spend $300.00 on qualifying products you get a $75.00 rebate. Spend $50 and get a $10.00 Rebate. This program is limited to one (1) rebate redemption per calendar year, with a maximum of $75.00. CLICK HERE for more information. NOTE: To qualify, you must supply completed RCBS rebate coupon, original UPC barcodes from package, and original cash register receipt and/or dated, itemized sales invoice.
2. Monmouth Reloading — 1000 Lake City 5.56 Cases, $68.95
1000 pieces of Lake City brass for under seventy bucks? Yep, that’s a deal and a half. Monmouth Reloading is selling genuine, once-fired Lake City 5.56x45mm brass, thick-walled and sourced direct from the U.S. Military. Monmouth reports: “Our current stock of Lake City 5.56 looks to be all newer year Lake City head stamp but may contain a small percentage of other NATO headstamps. Lake City is a popular, reliable brass, normally capable of many reloads.” Monmouth includes 1% overage to account for any damaged brass. NOTE: Brass has crimped primers, so the pockets will need to be reamed or swaged prior to reloading.
3. Grab A Gun — Remington PSS with 20″ Heavy BBL, $589.00
Remington’s Heavy Barrel PSS model established a reputation for excellent accuracy. This .308 Winchester version features a 20″ heavy barrel threaded for a suppressor. The action is secured in a strong, pillar-bedded Hogue Overmolded ghillie green stock. The trigger is the X-Mark Pro externally-adjustable model set at 3.5 pounds. Weight, without rail or optic, is 7.3 pounds. NOTE: This PSS Rifle may also qualify for a $50.00 rebate from Remington. Inquire before you order.
4. Optics Planet — Leupold Mark AR MOD 1 1.5-4x20mm
Scopes for Service Rifles. Starting next year, under proposed new NRA Competition Rules, Service Rifle shooters will be able to use optical sights with a max magnification of 4.5X (fixed power or variable). At one-third the cost of a 4X ACOG, the Leupold 1.5-4X Mark AR is a good scope choice for the new optics-legal Service Rifle Class. Optics Planet currently has this on Sale for $299.99. With a Duplex reticle, this is also a fine hunting scope.
Every gun owner should have a work mat to protect valuable firearms during cleaning and maintenance operations. Right now you can get a quality 36″x16″ mat for under ten bucks. The non-slip polyvinyl chloride (PVC) surface won’t harm gun’s finish, and its absorbent features keep the fluids from going through your work surface. This week Amazon is offering the Printed Version (shown above) for $9.99 and a Plain Black Version for just $8.09. That’s an excellent value either way.
6. AmmoMen — Federal .22LR Target Ammo, $3.25/50 Rounds
This Federal Gold Medal Target ammo is MUCH better than common bulk rimfire ammo, yet with this deal, it is only 7.5 cents per round — that’s cheaper than pretty much anything else you can buy according to Ammoseek.com. Right now you can get up to ten (10) boxes of this .22 LRrimfire ammo for just $3.75 a box from AmmoMenLLC.com. If you need rimfire ammo, don’t delay — we expect this ammo to sell out very quickly at this price.
7. Walmart — Multi-Purpose Work Bench with Light, $69.95
This 4 foot-wide bench can serve many functions in your work room. We don’t recommend mounting reloading presses to it, but it can hold your tools on the backboard, along with dies and small parts in the drawers. Place bulky items (such as media separators) on the lower shelf. This bench features built-in lighting on the underside of the upper shelf.
Weight Capacity: Bench Top 220 lb, Bottom shelf 200 lb, Top Shelf 44 lb.
Dimensions: 47.4″ (L) x 23.8″ (W) x 61.6″ (H)
8. Bullets.com — Handgun Safe $49.95
This pistol safe keeps your handguns secure while still permitting instant “push-button” access. The three-button lock can be personalized with 3- to 8-digit codes, and there is a key override. This safe will hold two (2) full-sized pistols and can also store passports, cash, or other valuables. The spring-loaded door gives you near-instant response. The all-steel case also includes mounting holes for fixing the safe to floor or shelf.
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The .300 AAC Blackout aka “300 BLK”, is a compact 30-caliber cartridge designed to work in AR-15 rifles. It has a shorter cartridge case to accommodate the bigger 30-caliber bullet while still fitting in a standard AR-15 magazine. Unfortunately, that’s the danger. A careless shooter can toss a .300 Blackout cartridge in with .223 Rem rounds without noting. And because the case-head size is the same as the .223 Rem (5.56×45) the rifle’s bolt assembly will happily chamber and fire the .300 BLK round. Problem is, that forces a .308 diameter bullet down an undersized .223-caliber bore. Not good!
