This was my project at AAC and Remington, and I will add to this conversation about why we created 300 BLK when 300 Whisper(R) already existed. The first was that 300 Whisper was not a SAAMI cartridge, and without it being in SAAMI, Remington and other large ammo companies would not load for it. Second, the military wanted to be able to switch from subsonic to supersonic and not have to adjust the gas block. I worked with Remington to create subsonic loads that purposely made more gas so that they would cycle the action that was set up for supersonic. 300 Whisper, at least how it was commonly loaded with fast powders, would not do this. Third, we created custom bullets that were 110-115 grain but with a very large ogive so that they would be magazine-length. This prevented them from shifting forward in the magazine if bumped. The long ogive was designed to have the same diameter at the rib of the magazine that normally rested on the case neck as the neck of a 5.56mm case. This kept the rounds from canting inwards, which allowed you to load a full 30 rounds without hanging up in the magazine. Not every ammo company understood any or all of this, and even today, many or most don't. I had permission from Remington to not keep it a trade secret because we wanted the cartridge to succeed, and so were open to helping other ammo companies. We worked with Hornady, Barnes, and some others. Also, 300 BLK is the first cartridge that was used by the military with expanding projectiles. As for the name, the official name is 300 AAC Blackout, and the short name is 300 BLK. There are no other names. Also, 300 doesn't begin with a "." 300 BLK has more energy from a 9 inch barrel than 5.56mm from a 16 inch barrel, making the supersonic particularly good for SBRs or PDWs. I am using a 6.5" barrel myself, and the military uses 5.5, 6.75, and 7.75, but started with our 9 inch barrels for the first combat use. The problem with 7.62x39 is that it doesn't really work in an AR. I tried it for a while, and broke three bolts due to the larger boltface. If you load an AR-style magazine, it jams up if you put in more than about 10 rounds. Also, the case is too large for efficient subsonic use.

I absolutely love these cartridge talks.

There may be more efficient ways to burn money but 300 blackout is a damn fun way to do it.

I learned of the 300 blkout on a deployment to Afghanistan in 2010 and without saying a lot a buddy of mine from a certain team started using it. Since then I am heavily invested into the 300 blkout. I have my 300blk 8.5" AR PDW/Truck gun, a 11.5" upper receiver for hunting, & my Encore Pro Hunter 6" pistol barrel with a 1-5 twist. And I use my suppressor on all three firearms. It's got to be my favorite caliber to have fun with. Plus my buddies daughter likes to hunt with it my 11.5" AR set up.

A few years ago, I got to shoot a suppressed full auto AR in 300. It's rapidly becoming my favorite cartridge.

That was great! This round is a "love-hate" for many. I'm glad you guys looked at it for what it is. A great little round with some good performance.

Glad to have you guys back for cartridge reviews again... Please more!! 🤗

I’m really liking these common sense debates and explanations of where things come from. Thanks guy’s!!!

So glad this is back it’s one of my favorite podcast series you do!!

Excellent discussion on the 300 BLK!!! Thank you for posting this. There seems to be far more 300 BLK naysayers than proponents, but I love my 300 BLK carbine and pistol. I might have missed the words in the video so forgive me if you said this, but this cartridge gets its high performance in a small package because it uses pistol powder, not rifle powder. It’s an ingenious design! I handload and I use 110 gr Nosler Varmageddon bullets: 2415 fps in my carbine; 2200 fps in my pistol. As long as I hunt within the bullet’s kinetic envelope (which you must do for ANY bullet), the 300 BLK is a solid performer. That many dead feral hogs can’t be wrong. Lightweight, accurate, and reliable.

Ryan, Jim, and Mark, now that you have touched on the idea, how about a 10 minute talk on subsonic hunting with commercially available loads and the comparison of those cartridges.

300 blackout is my favorite caliber. The best lethal cartridge suppressed and out of short barrels.

Glad this series is back!

300 blk is my favorite cartridge. So many options! brass is easy to come by. Every time I go to the range there are hundreds of 223/5.56 brass ready to be converted.

The true beauty of the 300 aac is the amount of variety / creativity a reloader can have with it. Using the right powders with the right bullets, I can run 110g , 120, 125, 150, and 200g bullets all on the same build with no issues or adjustment. So many 30 cal projectile options

I built a cheap 8.5in 300blk pistol and absolutely love it. Sweet all around gun; excellent power with 125grs , great accuracy within 200yds

Take a look at Maker Rex bullets. They do some amazing things in critters at sub sonic speeds. 300blk is a fantastic cartridge for hand loading. The selection of bullets in 30cal are second to none. The powder charges are small so a little goes a long way. One of the most unique aspects of the cartridge is the ability to shoot semi auto subs and supers back to back, no changes needed in a properly speced AR. There aren't a lot of center fire cartridges that you can do that with.

I haven't even watched this yet, but as soon as I saw this in my feed my reaction was "YEEEESSSS!!!"

I have to be honest, these are awesome segments. I’m a 6.5 grendel and 300 blackout guy (both suppressed subs and supers per application). Both seem to be fringe cartridges now. It’s good to see and hear these discussions. It has nothing to do with dual Vortex logo decals on both my left and right, rear door windows of my truck.

Now that we’ve covered the baby blackout, which with a 1:5 barrel that transfers rotational energy into expansion, you should look into covering Q’s new project, the 8.6 Blackout!! Same concept of fast twist and retained energy in a super fast twist 1:3 barrel!! SCIENCE!

The 300BLK subsonic loadings may burn all their powder charge in 9", but supersonic loadings have been proven to still gain velocity and therefore energy in 16-20" barrels. This fact disproves the often repeated statement that 300BLK burns all it's powder in a 9" barrel. Reference Mrgunsngear 300BLK videos.

I’ve been listening to y’all pod cast and just finished up the ww2 rifles show and tell and it’s finally nice to put names to the faces. Love yalls material. Keep it up

Love these cartridge talks! Btw, GREAT shirt Jim!

Great vid as always, keep 'em coming! Still waiting on that .222 Remington #10MinuteTalk!! It spawned all those cartridges from 17 Rem; 223 / 5.56; 300 Blk and even the German 5,6x50 and 5,6x50R you guys have never heard of.

Love all of the reviews! Keep them coming! Also 300 HAM'R for Super Only, Smokes the BLK.

I have a few 300 blackouts and many other guns. I tend to use my 9 inch 300 blackout more than the rest. It is very handy for pest control on the farm and just a lot of fun.

It's great hearing someone discuss the origins of the round with JD Jones and the 300 whisper. JD was way ahead of his time introducing the round in the mid 80's. My first experience with the round in the 90's with a friends contender pistol with a 9" barrel and 100 yd groups were well under 1/2".

Great round, little recoil, pretty quiet and puts 'big holes' in whatever you hit. Great short range 'offensive' tool. Very good point towards the middle of the video regarding the gas system, that is a big deal.

Absolutely spot on! I own a few with barrels from 8”-16” in bolt and AR platforms and absolutely love playing around with this on the loading bench! A suppressor is next on the buy list and hope to get it done early next year. I also own AK platforms and wouldn’t give them up for anything. That being said people should just buy what they like, using good information based on what they are looking to achieve.

Love the content! Sawyer love to hear back from you brother! This is industry changing stuff you guys do!

AAC Developed it at the request of Special operations to replace the 9mm (MP5) for CQC .

I have both the AAC Handi Rifle and the CVA Scout TD in 300 Blackout. Super short guns at around 29-30 inches. They both have compact/youth stock on it as well, though the Handi is even shorter. Both have rails though the CVA is a Weaver rail. I have compact red dots mounted at the forward end of the rails. This allows the rifle to be carried at its balance point. These two both make great close range stalking rifles for deer hunting. The Barnes 110 grain VorTX load is deadly on deer, and always passes through. I absolutely love that layout.

Excellent discussion.

I have just discovered this channel. This is awesome!

Finally watched this video. Always Great Information, now ,past, future.

Love the honesty!

10 minute (cartridge) talks are by far my favorite. Plus, y’all don’t act like a gun store/KZfaq expert. You know the guy that suffers from a severe case of the Dunning-Kruger effect.

Would love you guys to do a 10min talk on the 338 Federal! It’s a secretly effective and versatile round!

This was fantastic

A buddy bought a Ruger AR pistol in 5.56 and it is almost painfully loud to shoot. I bought the 300 BLK and absolutely love it. I also have a Remington 700 in 300 BLK and with my Sig can on it, it is nice and quiet. AR rifle is 5.56 for me and 300 BLK in AR pistol.

.327 Federal magnum someday please. Love these 10 minute-ish talks.

Love these!!!

I like all calibers as long as it goes bang it puts a smile on my face

That dude is a guru of cartridges. You all never disappoint me. Thanks alot

Bro that Follin McRae Subaru 555 Shirt is Awesome 👌 I'm definitely trying this cartridge out

I just got done building a 300blk and freaking love the gun. Reloading it gets cost to sub $0.50cpr

I know you made this video over a year ago, but I can't believe that none of the three of you have a 300 BLK gun. I am a super fan of 300 BLK. I didn't get into AR platform guns until I was 62, but my very first was an [original] Sig MCX, 300 BLK with a 16" barrel. I currently have four 300 BLK guns, from 10.3 AR style to a 16" bolk gun in an MDT precision chassis, and I just bought another one that I can't wait to get, a Sig Spear LT in 300 BLK 9" pistol. To say that 300 BLK is my favorite cartridge is an understatement. In my not so humble opinion, I believe it is a far superior cartridge to the 5.56. The 5.56 will be around forever just because it is prolific throughout the world and it has such a storied history, but I personally don't own a 5.56 and can't think of any reason to own one, other than shire availability and cost of ammunition. I can afford 300 BLK and keep plenty on hand. The 300 BLK will never take the place of 5.56, that will be the job of 6mm ARC, but that is a story for a different day. On a different issue, I 100% concur with Ryan. I would not take, or recommend, anyone trying to take down a whitetail deer with 300 BLK subsonics at anything over 50 yds. I have shot a lot and I have chronographed a lot of 300 BLK. A 220 gr 300 BLK drops like a stone after 50 yds. Personally, I see 300 BLK as having about the same distance and terminal effect on a white tail as a high end crossbow. Thanks for making the video, it was an interesting discussion.

Favorite AR platform cartridge. They are just fun.

So glad you aren’t dead Jim! I was really worried about you! Merry Christmas 🎅🏿

Great caliber choice

Awesome video guys. It's not about the 7mm Rem Mag, but It'll do for now 😉.

I use the Hornady 150 Grain SST bullets. While loading my own cartridges. I have taken several deer and love this cartridge/gun.

Very informative, thanks. answerer some questions with regard to .300 cal for me. I have a Wyndham Weaponry AR in 7.62x39, pretty happy with it, but I’m about start a build and I WAS set on caliber, but you’ve given me some new things to consider first.

. 300 BlackOut .... magical cartridge!

If you do the 6.8 SPC podcast, please compare it to 6mm ARC and 6.5 Grendel. I feel these are the 3 medium bore premium cartridges a person has to choose from in a gas gun.

I have taken a few deer with a TC Encore 16 inch suppressed 300 using hand loaded 125 Nosler BTs. Great little platform for crowded spaces like small blinds.

Thank You for acknowledging J.D. Jones and the Whisper. I was shooting Silhouettes at the time. We were shooting it before I ever heard of the Black Out. However, outside of the Silhouette range, I’m having a tough time nailing the Black Out down to a specific role. I shoot it suppressed but it is also useful with the lighter bullets going faster. It’s almost like I need two scopes on the rifle, zeroed for the different loadings. Oh yeah! Earned a new sub.

300 Blackout: To know it is to love it.

.17 K Hornet, 7.82 Lazzeroni Warbird, and .225 Winchester would be some awesome cartridge talks! Ask Ryan about the .225 Winchester though ;)

300 BLK - versatile cartridge with a lot of neat applications. Like the man said, you can have a short barrel and get similar performance from it as if you were shooting a 16+. The ability to shoot different grain weights and suppress it near silent is pretty, dare I say "rad"? I am still trying to dial in my 220 grains at 100 yards. And discreet ballistics makes a fun subsonic cartridge.

Its a neat little cartridge that is close enough terminally to several other calibers in dia and energy. It shares a bolt face and mag length with a popular cartridge and uses common slow pistol powders. Its good enough at everything that it's boring and a barrel swap away.

Can y'all please do a 10 minute talk on the 257 Weatherby Mag. I absolutely love the 10 M.T. 's , y'all keep up the good work thanks guys.

👏👏👏 excellent video

Finally. Thank you.

Dropped my first deer this year in her tracks at 167 yards with a Q mini fix 300 blk, nomad ti, trijicon accupoint 3-9, black hills 110 gr ttsx. I did miss a buck at what i estimate to be 200-250 yards earlier that day. I didn’t realize he was quite that far and think the bullet went under him is the best i can come up with. I wanted to use the hornady subsonic 190 gr but I could not get it to group well at all, bullet drop is significant after 80-100 yards and I was told it sometimes doesn’t even expand or that well.

I am a fan of the AR-15 chambered in the 7.62x39! I have owned/built 3 of them, one is a dedicated whitetail rig. I really like it, but I reload most of my hunting ammo so I can build what I need for that caliber. Great talk though and I agree with many of the points made.

I bought a 300 blackout and love it more than I thought it would. I have an AKM clone and it seems that recoil is significantly greater. Granted we are talking about a piston gun vs DI, but the AKM definitely hits the shoulder a bit harder. The .300 hits it less. I am left with the impression that in close 7.62x39 has a bit more power. But I love the precision of my AR in .300 within its effective range.

THANK YOU, FOR DISCUSSING THIS CARTRIDGE! I HOPE THAT THEY SOON DEVELOP A .400 BLK, OR, .500 BLK!!!...

Honesty I’m a convert, I made fun of it years ago but when I got into reloading it changed everything. It’s now one of my favorites hands down

Discrete ballistics is a great starting point for expanding subsonics, both q and sig have moved to 1:5 twist barrel for several good reasons. 300blk has been in military service for awhile now and is even trickling down to lower tier units in limited numbers. Anyone wanting an in depth .300blk talk should go check out the live q or die podcast

I was just looking for more info on this few days ago. It's like y'all read my mind

I recently purchased a Daniel Defense PDW 300 with a 7” barrel for two reasons: home defense and hunting here in the pinebelt of the southeast. I run 110gr Hornady supers for home defense and 188gr Discreet Ballistics subsonic Selous Expanders for hunting where shots greater than 75 yards are rare.

Need a ten minute talk on the 6.8 spc. I have two and hunt west Texas with them every year.

Loved this talk. At this point though I might get my backordered Razor gen III before you do a 6 ARC talk...

I recently purchased a 10.5" 300 Blackout upper for my SBR stamped lower and have been shooting subsonic rounds through it with a Dead Air Sandman suppressor. I'm loving it immensely. It's weird to hear to hear the bullet slap the paper at 50 yards. I like "stupid quiet", thank you.

Hornady 190 gr subsonic at 74 yard's put a 8 point buck on the ground now, this last November ,, 300 aac is my favorite work gun ...

Hey guys, me again, so I just heard about the new 8.6 BLK. Supposedly a subsonic round capable of taking big game at near 300 yards! Hype or fact? If true what a game changer!!! Love to hear your take.

There is something very interesting about putting intermediate cartridges to work either maxing out it's effectiveness with either distance or large game hunting. I am a huge gun person and have never had the opportunity to shoot the 300 Black out. I remember when the ruger mini series semi auto rifles came out in 300blk and it was all the rage. Never heard anything bad about it and people swoon over it for hog hunting.

I have a Howa in 7.62X39 as well as an AR upper. I reload and yet like the availability of 7.62X39 in factory ammo. I practice with steel case and use brass case empties to reload with Barnes bullets. They are deadly on deer out to 200 to 250 yards. In the Howa I can push pressure beyond AR pressures safely and rivals the 45-70 with better balistics. The biggest draw back most 300 blk out fans spout as their advantage over the 7.62X39 is bullet availability. What they don't know or won't say is that .308 bullets also work in the 7.62X39 cases. In fact the Lee dies come with both .308 and .311 expander plugs. In the AR platform for extended use the blk out does have the advantage of the beefier bolt lugs however case for case I prefer the 7.62X39.

I have three 300 BLK rifles. A 10" AR, a 7" PDW AR and an integrally suppressed Rem 700 bolt gun. Each is fun in its own right.

Twist rate is important to the short barrels and subs. Especially for accuracy and expansion.

Great calibre talk. Hope you pick the 35 Remington soon for a talk.

A close friend of mine has used the 300 BLK in combat in Eastern Africa. He said that bad guys don’t get up after getting hit with the 300blk, unlike getting hit with 5:56.

I have shot hogs in TX with a 10 inch 300 Blackout AR pistol with the 110 gr Tac-TX bullet, and it is my second favorite pig killer for work in thick cover; with my favorite being my 450 Bushmaster

I've been loading 300 BLK for about two year's now, and I still think its funny how Little powder is used in the subsonic loads, I just wish the price on primers would come down a bit, and that the availability would come back to normal so we can start buying bricks again, my LGS is still limiting primer sales to 3 packages of 100. Also, I've done the .223 to 300BLK brass conversion and it adds a little extra fun and sense of accomplishment when reloading, I do turn the necks just to be sure they're not too thick. In my 300Blk AR I've had to play with buffer weight to function my sub loads, but my Ruger ranch rifle Loves the Hornady 225gr ELD match using Hodgdon Lil'gun. And of course suppressed.

It's a fun little cartridge. No suppressors allowed in my state, so I got an upper with a 16" barrel. For me, it's a better close-range home defense rifle than an AR in 5.56, and one I would feel better about deer hunting with. Mine is mostly supersonics only except if I find cheap subs to plink with.

Last year, I was in the market for a lightweight bolt gun to hunt the puny local white tails. The Ruger American Ranch is chambered in both 300 BO and 7.62x39. I eventually decided on the 7.62x39 because of the availability of inexpensive bulk ammo for practice. But, I did end up having to load my own hunting ammo. Luckily, Nosler makes .310 caliber 123 grain bullets Just for the task. I’ve been thinking of an AR “handgun” chambered in 300 BO for handgun-only hunting areas.

I shoot mine much like you would a 30-30. I have not shot a deer with subs but have shot a couple with 110 Noslers. Great round and it is also pretty mean on a hog! Being in the south it's not like I ever get many shots past 150 in the thick woods anyways.

I have a box of Hornady 208gr A-max marked 300 Whisper. Bot the case 's are stamped 300 Blk. The 300 AAC Blackout is one of my favorite chambers in a AR. I have a 9" KAC SR30 SBR and a 12" AAC factory built 300 Blackout SBR. Both suppressed.

We use the 300blk, suppressed, with thermals for hog culling in TX. I really like the suppressors on everyone we hunt with to save our ears.

I’ve been shooting nothing but .30 caliber cartridges since I started hunting when I was 5 , the cartridges .30-30, .300 wm, .308, .30-06 , .300 aac blk is my most modern addition to the family… these rounds will take just about anything in or around North America

Have you done #10MinuteTalk on the 7.62x39? Great video again guys.

I luv my 8.5" 300 BO and run Hornady 110gr VMAX :-)

20 years ago my dad was doing the same thing loading the 30 carbine to sub sonic total awesomeness

Been deer hunting with the 300blk for 7 seasons now. It’s perfect for my hunting situation.

Thanks ! I have 762x39 but the 300 platform sounds more versatile, towards hunting .

The finest concept for in close to 200 yard suppressed and super sonic fire. Would you please have a discussion on the sighting issue between the two types of ammo.

For hunting deer and hogs we chose the 6.8, sold the Grendel and only have a 300 suppressed in a pistol for home defense.

It would be nice to see these cartridges out rolling around on your table.

So as I and most of use own this. I would like to add that the Bolt action is the way to go if stealth is your goal. Using pistol Magnum powder was smart.