7.62x39 vs 300 Blackout: Which one is Better? 

Kind of amazing that a cartridge introduced in the 40s is still going head to head with the most modern cartridges.

Unless you are gunning suppress and don’t mind paying 4x more 7.62x39 all day.

BOTH...... you choose BOTH!!

I got both 😁 Couldn’t be happier with my purchase!

Got both, I haven't shot my 300 in a year it's just pretty.... The 7.62x39(s) get play time regularly.

Not sure how much it matters but don’t forget that 300blk uses pistol powder so you get a complete powder burn out of a much shorter barrel than 7.62x39. For me that means I can run a shorter barrel, a more compact (lighter) firearm and still have solid performance.

For me caliber choices are easy, I always go with the one that's been around for years and where ammo is available and relatively cheap. There may be benefits to some of the newer rounds, but I don't do anything that requires those marginal improvements.

.300 Blackout is only eating the con of higher pricing. Eventually that'll go down... (hopefully) .300 Blackout so cool, and makes the AR even more versatile. IF you can, get both lmao.

I have two of the BCA 7.62x39 uppers, all I can say is : yes!

The price difference is what pushed me to 7.62X39 over 300blk. I have a Robinson Armament XCR-L kits for both 5.56 and 7.62X39. It was a pain to get the right 7.62X39 mags. C Products Defense seems to the best quality, however ASC has stepped up their manufacturing over the last 5 years. Even brass 7.62X39 is more affordable then 300blk. I've been using S&B. I do want to get the Hornady SST for Defense.

Great explanation i could follow everything you were saying thank you and you didnt over explain and confuse me. Great video!

Just Got 7.62x39 in 10.5” with side charging and couldn’t be happier

Why not both, I bought both from you guys and they both run beautifully

I like to hunt whitetail. I replaced my 99 year old Marlin Model 93 in 30-30 with a 10.5” 300blk. I finished the build about a year ago. I haven’t been deer hunting in 22 years. Last year was suppose to be my re-entry into deer hunting but covid severely limited my already severely limited hunting areas. I’ve only got to shoot 10 rounds from the 300blk and that was about a month ago. Installed a brace, a Kaw Valley Mach3 linear comp, and a Vortex Strike Eagle 1x6. Sweet shooter! However, I won’t be hunting this season either… it is what it is. Here’s to next season!

I’ve got a 7.62x39 in 16in and 10.5in and I’ve got 300Blk in 16in and 8.5in love all 4 of em!!!

Had my 10.5” 300blk from you guys for nearly 2 years. (Got it sub $200) The only issue I’ve had with it was the burrs on the feed ramps. That was resolved by polishing it. Still eats anything I put through it.

Pretty sure I got my 7.62 and Grendel on the same purchase. I love bear creek.

Love my Gen2 Side Charge 350legend. Runs flawless and cloverleaf’s almost everything

If Tulammo moves to US.. .300 blackout tulammo please!

I have a bear creek 10.5 barrel and love .300 blk. Out all the way

I could not decide so i got both. So now i am waiting on you to make my 450 bushmaster in a 16 inch stainless barrel...ammo for 300 blk is pretty high. No doubt.

Do videos like this but with direct comparisons between the two rounds. It doesn’t even have to be ballistic gel just put a piece of ham or pork loin, also do drywall testing. Do different calibers (9mm, 5.56, 7.62) using different popular barrel lengths to see the differences in effectiveness of the rounds versus meat. It’ll help us make decisions like, I want a short AR, but 5.56 out of a 7.5 in barrel is basically just a flash bang with garbage terminal ballistics. 11.5 is viable for 5.56, but too long. Maybe I should go with a 9mm JHP if I need a really short AR. And with the testing we’d see the 9mm JHP outperform the 5.56 out of a 7.5in barrel.

Sir, to add on the description of the .300 ACC; the reason why the cartridge is smaller than the .556, is because it (.300 ACC) uses pistols powder instead of rifle powder. Very ingenious if you ask me.

Only thing I’ve gotten from BCA that DIDNT work was the Mag on my 7.62. I bought two and neither would feed. Got a different manufacturer and the rifle runs like a GEM. Im DEFINITELY gonna get that short upper in 7.62

When I first bought the 76.2 upper I just used a Magpul 30 round 55.6 mag and it worked fine.. Can only put 8 or so bullets in but it shoots.. I got a 10 and 30 round ASC mags that work fine

Reloading 300blk is easier with better bullet selection

You left some important facts out. The 7.62x39 is a tapered case and that is why longer magazines must be curved. It also has a larger case diameter. Most important is that the AR-15 bolt is marginal relative to durability when firing the 7.62x39. It really needs a bolt more like that of the AR-10 like what CMMG uses for their 7.62x39. But my BCA upper a few years ago was under $200 and so it is cheaper just to keep a spare bolt and extractor. I have a store of X39 ammo and so it pays to have an AR upper to fire it. My BCA upper is way overgassed and so it was necessary to change out the buffer wts to H3. That changed the ejection pattern from like 2 o'clock to 4-5 o'clock and all magazine types would work. This should also increase the longevity of the extractors. Most x39 ammo is not intended for hunting. More load variety in 300 blackout relative to projectile types needed for hunting.

762x39 is better and its even better running in a Ak 47

Thanks !

Bless You And Your Business

With the Russian import ban, I went 300blk 10.5 in. Figure it would be a sweet deer/hog gun and home defense

300 blackout rtw! Lol I just love it so much fun and easy to change from 5.56 I just have an extra 300 blk upper I put on my ar lower . It really is just quick and easy but yes a lot more expensive to shoot.

300 blackout is a great round for subsonic loads. Only plus I see.

It's the shape of the 7.62 × 39. Not the length or the diameter it's a v shape that causes the Goofy AK mags

I've built a 762AR and actually found mags that needed just a little bit of work. Then I found the "MutliMags". May only hold 28 rounds but haven't failed me yet.

7.62x39. Don’t see a point in 300blk. Other than suppressed

I use the 7.62x39 we could use some after market support for magazines but as far as the 7.62x39 I've always used the enhanced firing pin never had any issue other than crap mags not feeding. Also the case size on the 300BO is too small and can't get the powder to reach proper pressures this means even 125 grain will never reach a velocity above 2500fps you'll be lucky to hit 2400fps consistently the 7.62x39 has a wider case and can fit more powder in the case. Plus it's way damn cheaper!

According to what i have read and it makes sense, the 300 blackout bolt is more durable in design than is the 7.62x39 bolt when fitted into a standard AR15 bolt carrier. Particularly the extractor in the BCA bolt various people have claimed that it breaks prematurely. I have order a replacement bolt with modified extractor from Young and will see how well it works. But it now seems that 300 blackout chambered AR15 are more reliable for SD. The x39 has had more metal remove from the bolt head and also from the extracter to allow the larger case head of the 7.62x39 to properly fit the bolt recess and extractor claw.

7.62x39 uses the same bolt carrier as a 5.56 AR. Different bolt

I HAD TO STOP BUYING BCA.... ITS JUST TOO ADDICTING BEING ABLE TO BUILD WHATEVER YOU WANT. THANK YOU ALL FOR THE SERVICE YOU PROVIDE.

Grendel you won’t confuse or chamber with .556

I went 7.62x39 for the simple fact I already have ammo for my SKS.

AK15 is a good gun to have. AR47 is a good gun to have.

Waiting on my 300blk upper with the side charged bear claw barrel to come in next week! The 7.62x39 is hard to find in copper here in CA and since I'm building this set up for hunting purposes, the 300blk will be easier to find in copper.

The C-Products Duramags for 7.62x39 I found to be the best.

Faxon made a 20" 762 by 39 and a 20" 300 blackout barrel I have a 20" 300 blackout barrel for the arak21

I reload 300 blackout with polymer tipped 110gr, max charge under 30 cents per. And out of a qm16 inch barrel it's hitting 2375 fps, that's just under 1400 ft pounds. Harder then 762x39. And it's frangible. Leaves a 14"x5" hole in meat. Owwwieeeee

7.62x39 for me.

doing a 7.62x39 ar build ...good shit

Bca is one of the greatest gun manufacturers. I hope the RU-vid side blows up for you all. Classic firearms are greedy, lying backstabbers. I have a 308 side charger and it's one of if not my favorite gun in my collection. I think a 556 or 762 will be next:) God bless America!

I have them both in rifle. I have the 300 blackout in pistol planning on getting the 7.62x39 in pistol shortly

Since the .300 BO is made off of the .556, and uses all the same BCG, it can be chambered into a .556 chamber, since the case has been cut back. This can ruin your day, because that projectile won't fit down that barrel. So, you have created a bomb that is inches from your face. It would be very easy to pick up the wrong magazine, or get a .300 BO cartridge mixed in with .556's. If you are shooting both calibers, make certain that those don't get mixed. Accidents can happen, so for safety I'd opt for the 7.62x39. You can't get those mixed up with .556.

For me the price of ammo and availability. So 7.62x39.

300 BLK is now same cost as 39mm due to the war and no more rooski ammo .

I'm absolutely going 300 blackout, Palmetto state Armory sells AAC ammo cheap I get 110 vmax and 125 fmj for $11 a box .

The 2 cartridges perform pretty close to each other. Where one edges one out in some areas, the other performs better in other areas. The big advantage to .300 AAC is its compatability with the AR Platform. It also comes in a wider choice of projectile weights and types. Its biggest disadvantage is cost of ammunition, as .300 AAC typically 2-21/2 times more expensive that 7.62 x 39. Personally, I prefer .300 AAC, and the reason why is I have a couple of buddies that have the Soviet Uppers and magazines to use on their lowers. Both have feed/ejection issues occasionally, just enough to cause me to hesitate to go that route. It might be their ammo, it might be their uppers, it might be their magazines. I don't know, and it doesn't happen everytime we go shooting, but on occassion one or the other will have some issues. I lean more towards the ammo being the culprit as both buy the cheapest steel cased surplus they can find. I would also point out, if you compare the price of "reloadable brass cased, boxer primed" 7.62 X 39 to .300 BO, that price difference narrows considerably and to get JSPs or OTMs the percentage narrows considerably to where .300 BO is only 10-30 % more, depending upon manufacturer. I don't use steel cased ammo because I reload, and like working up perfect loads to achieve consistent accuracy, performance and reliability for every gun I own and load for.

throw a. opper case on the 7.62x39 and the are a lot more accurate. the 8.6 blackout won me over though.

Both I chose both!!!

Since I own a BCA right charge 7.62x39 16in upper... I like it. 2/4/23 Just DO NOT USE lacquer coated steel ammo without lubrication, lithium grease, or red high temp grease... breaks the ejector.

AK is more powerful but in a Suburban situation, the 300 is more practical and better protection without over penetration

Make a 26” 28” 30” upper in 762 x54r please

I have both.Heck I've got 5 different AR15 in 300 Blk Out from pistol length 8inch barrel.to 16 inch thaI built.I used to not be real high on the 300 BO until I got a couple suppressors.I ki da like it now. However I really like my 7.62x39. I bought a complete upper from BEAR CREEK ARMS = AND IT IS A TACK DRIVER..I couldn't believe how accurate it is with the cheap spam can ammo kandy the cheap Wolf and Tula I shoot I've got to gi e a thumbs up on the 7.62x39 because of ammo prices. It seems to have a better Thump on the hogs to me.The 300 BO suppressed Is a killer though.But damn the 12 inch drop at 50 yards from 150 grain Frontier ammoto the 225 grain Fiocchi ammo was a surprise to me. I can't in knock either round. I've had good luck with my 7 BCA barrels.. All except one in 223 Wylde.The crown had a "V" in it like it was dropped on something.I couldn't figure out why it shot so bad until I removed the Flash Hider. I was about to return it.But when I put on a SilencerCo ASR and Suppressor it shoots lights out.

I just got a .223 wylde complete upper from you guys and I'm not really allowed to hunt with an AR in this state so that's probably all I'll ever need. But maybe getting a 300 barrel for suppression shooting at a later date could be fun, idk. Will let you know how it performs when I can afford a range trip. (Spent more than I should have to get everything else I needed, but still barely over 400 for the full gun, iron sights, 3 mags, and a laser bore for later).

But your testing needs a part two since the 7.62x39 uses a longer barrel and up to 400 yards. You need to test the 300bo with a 16" out to 400 yards

7.62x39 is actually .310 diameter through a blackout is actually .308

300blk. Much better round to handload for

Colt made a gun lower that could adjust from 5.56 to 308 with upper swap and buffer change. For the life of me, I can't figure out why some one has created a gun that can do the same with 300 B.O. to 308 with just and adjustment to the lower mag well.

Well I chose both 🇺🇸💪🏼

7.62 because I can afford it

What's the wear & tear comparing an AK barrel & BCA's AR-15 7.62×39 barrel using steel cased ammunition?

For the AR15 platform the 300bo is the way to go

150gr Triple shock and use a magnum primers for all whether

Do y'all still have any of those old hand guards? Those are the ones i like

Seeing the 7.62 x39 upper you guys just sent out to me bypassed the quality assurance process. With lack of people in the customer service department blemished or not fit for service should be the type of videos y'all should be putting out.

When are you getting more 16 inch right side charging 7.62 uppers in stock?

A 7.62x39 20" or 22" heavy barrel would be nice! Hint hints! 😁

🔥🔥🔥

I think the curved magazine is necessary because the 7.62x39 case has a taper

Or you could just buy both:) uppers under $300 just sayin.

The ruger mini 30 mag are 20 rounds and they are straight like AR mag... Ruger must got it right ✅ thank me later. 😉

Can the 762 upper be used on the psa ks47 lower that take Ak mags???? need to know!!!

I always like to say the difference is ones a precision round and one isn't. But imo handloading with better materials should fix that difference.

Or 300 win mag upper can u start selling those or 40s&w 45acp 10mm that be awesome

To me both are good

c products 7.62x39 mags work best for this application. in the AR 15 platform. If you're going to use steel case ammo get the enhanced firing pin in all AR 15 platforms. a stronger hammer spring is also a good idea. this will aid in light primer strikes. This is from experience. I have 6 AR 15s and all shoot brass and steel case ammo. All are BCA uppers.

350legend-- affordable - accurate-- hits a TON ! Lots of bullet choices , available ,

I that it shares clips with 223. And how it works with a can.

I have a 300blk and a 7.62 and havnt shot any of them :/ moved to the city 🤦🏻‍♂️

Both great rounds. 300 blk has a large bullet/round (147, 150). Lean towards 300 blk.

Please make a 300 Ham’r!!!

Currently a thousand rounds of 300blkout is only $80 more than a thousand rounds of x39 ammo.

Is there any real difference between running both of these suppressed? Is it bad for suppressor to run cheap ammo?

Shop local guys. I love close and enjoy what I have purchased from them

I will add one strong reason to go 7.62x39, the mags ARE different. If you should forget that your mag has .300 blackout in it and you put it in your 5.56 rifle, it will fire and destroy your rifle as you try and squeeze a .300 caliber projectile down a .22 barrel. There are videos out there showing this exact scenario playing out. Just my $0.02 worth. YMMV.

I bought both of them from u guys, I’m having problems finding a magazine that works for the 7.62x39. Any suggestions so I can post a few videos I don’t wanna record any until it works better, I own a asc 10 round magazine and they want chamber.

Be nice if the barrel would’ve been compatible, and muzzle.

suppressed 300 blackout same muzzle energy as 45 and zastava doesn't make a Ak pistol in 300 and my m92 probably my favorite gun 😉 although I always wanted one way to expensive on the ammo prices

what iron sights are those?

A .300 Blackout cartridge can chamber in a 5.56/.223 and if fired will produce catastrophic results. A 7.62x39 won't.

Love you guys and have bought many of your uppers. Not sure why you made this video though the way yall did, since it was supposed to be an informative video. The way things where discussed seemed more like some one talking about it and not feeling confident in what they where talking about. in the video phrases like, I think, or I could be wrong, or I dont know was said in this video. Do the research like other youtubers and speak more confident. :) Love your uppers.