Help me choose

>>34509184

.300 is just 7.62x39 made to fit ARs better. Go with 5.56

>>34509192
For what reason though?

>>34509184
Unless you have a specific reason for .300, it's best to go with a standard .223 for an AR
If you're worried about stopping power, just get something in 7.62

>>34509199
Ammo price

>>34509184
buy a 5.56 barrel.

300 memeout is not a cartridge for beginners to the ar15. 5.56 is perfectly fine, and much cheaper.

>>34509184
300 blackout is a meme just get 5.56

>>34509225
Yeah I just looked at ammo prices, holy shit. 300 blackout is insane.

Get 5.56 first, it's a more common and versatile round. 300 blackout is good for SBR's and suppressed rifles.

I'm a huge fan of 7.62x39, and similar rounds. However they have some pretty glaring disadvantages. Ammo weighs like 1.5x that of 5.56. The rainbow trajectory makes it difficult to place shots beyond 400yds, where as 5.56 can be stretched out to 800yds with the right load (mk262). It has a bit more recoil, still pretty tame, but noticeably more than 5.56.

That being said < 200yds it's superior to 5.56, it'll plow through things 5.56 just won't. With high quality hollow points, it'll fuck things up far better than 5.56's fragmentation ever will.

>>34509254
I'm surprised 120gr loads are still so expensive, seeing as the round has gained a ton in popularity. Feels like someone should be making it in the 30-40cpr range. Maybe because there's no downward market pressure from Russian mfgs?

>>34509184
isn't that one on top way too much bullet for that gunpowder amount?

ARs are so cheap that there is no reason not to get both

>>34509386
My understaning: It uses different powder. H110 is used in magnum rounds and burns faster. It's what makes it so much more efficient in SBR's. Most of the powder burns up in the first 8 or 9 inches of barrel.

>>34509184
300 Blackout is used for shooting with a suppressor and/or hunting. If you're doing neither, 5.56/.223 is much better/cheaper.

>>34509439
thanks for the clearup

>>34509688
Add SBR/ ar pistol to that list. 300 memeout was made for shorty's

>>34509184
>under 10" barrel
.300blk

>10" or over
5.56, .223 wylde chamber specifically because you're probably shooting more .223 than 5.56

>>34509214
> implying 300 blackout isn't 7.62x35mm

>>34509184
Unless you have the intention to shoot suppressed, 300 blackout is just a meme.

>>34509386
>>34509439
300 blackout is loaded with pistol powders, creating a much faster burn rate. That's also why anyone building a 300 blackout gun should ALWAYS use a pistol length gas system.

>>34510089
The only thing that makes it a meme is noguns faggots like you spewing the same bullshit over and over again because you read some other noguns faggot spewing it.

Buy a gun, form an opinion of your own

>>34509688
It's also great for ar pistols and SBRs, and is an excellent round for reloaders, because brass and projectiles are incredibly common.

It also achieves 97% powder burn out of a 9" barrel, and has the same energy out of that 9 inch barrel as 5.56 out of a 16" barrel.

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>>34510089

>>34510114
Reloading I'm at .30-.40 per round depending on the weight of the bullet. Anyone reloading 300 cheaper than that?

>>34510114
Pretty much this. If you just want an ar with a heavier/larger round go for the 7.62x39 upper. There are plenty of snowflake options for the ar but most are expensive or specialty to the point of limited options

10.5-16" should be 5.56. 5.56 is effective to 600m.

9" for 300 BLK. 300 BLK is a 200m cartridge.

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If you don't already have an AR it's a no-brainer to get it in .223. Like other anons have said, .300BLK excels for hunting larger game <300 yards, for pistol/SBRs, and suppressors. .300BLK isn't a meme, it was designed to be shot out of an 8inch barrel suppressed. It's not cheap, but not as expensive as it used to be. Hopefully the Russians will start making it and drive the cost down to .223/7.62x39/6.5G territory someday.
>my AR senpai. pistol on the bottom is .300BLK

>>34510212
>200m cartridge

Try again

https://m.youtube.com/watch?v=tgKjbySsAik

>>34509184
Do you want to make a SBR or a dedicated suppressed rifle and have a shitton of money for ammo? Great, go with .300BLK. If however you want an AR for literally anything else go with 5.56

>>34509310

The price is going down slwly, but it's still only a little better than a wildcat round.

Plus "It's just 7.62x39" is a little bit misleading, since it's almost always loaded for precision, where russians can manufacture x39 in ridiculous quantities because nobody gives half a shit about quantity.

Notice that .300blk bolt rifles are taking off faster and faster. It's a great little DIY police-style marksman round.

>>34510122
That's for new brass, right? Because when I reuse brass it gets down to about 25cpr...

>>34511096

*half a shit about quality

>>34509184
New York here, since I can't have suppressors or barrels under 16 inches, is there any point to .300 Blackout here?

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get 2 uppers

>>34511489
Only if you want to kill something bigger than a coyote.

>>34511489
If you needed the larger caliber specifically for hunting with an ar15.

>>34511489
Can you also not have an ar pistol?

>>34509184
Projectile size != stopping power because stopping power is a myth. Get 5.56 unless you want to hunt, in which case get SAAMI spec 6.5 Grendel.

>>34511782

.223 with decent loads and out of a reasonable length barrel will take whitetail just fine inside normal hunting ranges

>>34510114
>It also achieves 97% powder burn out of a 9" barrel
Stupid question but that doesn't mean it stops accelerating right? IE, >>34510117 barrel length over 9" still increases velocity
So what's the significance of powder burn? Just flash & noise?


>>34511096
>It's a great little DIY police-style marksman round.
Can you expand on this? I'm thoroughly piqued

>>34513294
We can't, at least not here. I've heard of people having fixed mag AR pistols but my county refuses to allow them to be added to pistol permits so it's a no-go here.

>>34509254
If you reload you can get the prices down to 35 cents a round for supersonics, but the subsonic rounds are still going to be around 60 cents a round when you use Sierra Matchking bullets.

>>34509184
>more power
>literally the samee exact case with less room for powder

how about you focus on graduating highschool first mkay

>>34515888
> 3rd grade education
> can't into basic physics
> telling someone else to finish highschool first

Gotta be 18 to post here
Come back in 10 years

>>34509192
except weaker

>>34509192
7.62x35*

>>34510191
> implying 7.62x39 Ar15 isn't a snowflake
> implying 300 blackout is
> implying limited options on 300 bo ar's
> implying there aren't limited options on a 7.62x39 ar
> implying 300 bo parts are expensive

Wtf am I reading? the people who hate 300 blackout are the stupidest mouth breathing, knuckle dragging, fucking retards. You don't like it? Fine, move on, get something else. But to just keep repeating the same bullshit rhetoric in every thread, hoping to dissuade people enough that the cartridge dies and goes away, I can't imagine how these people function day to day.

Anyone who's actually interested in the cartridge needs to stay away from these threads. Do some research on your own.

>>34509184
.223

>>34515741
>>It's a great little DIY police-style marksman round.
>Can you expand on this? I'm thoroughly piqued

mid-range (sub-300yd), better penetration than 5.56 but not nearly as much as 7.62x51 for those safety-sensitive operations, suppresses INCREDIBLY well in 220gr loads, incredibly accurate when loaded correctly, and works very well from short barrels so you need to haul around less gun and need less room to move it.

>>34519685
Damn son got your snowflakes rustled? 7.62x39 is a common cheap as fuck round and way more useful in general purpose. Feed issues were figured out a decade ago and the only downside is needing different mags. 300blk is only useful in its price point for suppressed shooting. Otherwise you may as well go 30-30 hunting (unless its AR all day erry day)

>>34519877
Don't get me wrong that is a neat range of specialized capabilities. I just am not seeing the applicable civilian market outside of mallninja and without that costs will always be high

>>34509254
If you don't know why you absolutely need 300 meme, you will never need nor want 300 meme.

Consider it if you build a suppressed sbr but that's way down the road for you

The only 300 that counts are the WinMag, Weatherby or RUM

>>34509184
As someone who owns both, just stick with 5.56

unless you are looking to make an SBR with such a short barrel that your stock looks longer than the barrel, and plan on wanting to shoot suppressed without having to mechanically work on your AR, .300 blk doesnt really have any advantages over 5.56.

>>34520368
>only down side is needing different mags

AND bolt AND upper AND barrel AND lower.

Face it, 7.62x39 ARs are snowflakes.

.300 Blk requires a simple barrel switch. same bolt, same mags, same everything else. And its only price point is not suppressed shooting. .300 can and does continue to cycle ARs with well under 10 inch barrels while keeping their power, something 5.56 does not do well in anything that short.

seems you might be an AK fag.

>>34522298
Upper is fine always need a new barrel and a bolt face isn't that bad. Also in ban states all the fancy features for 300blk are moot. Look I get you are excited as fuck for the round but it will never catch on the way you are hoping. Granted I think it will do better than 357 sig or 10mm because it does serve a niche market in ways others dont/cant but for general purpose it is suboptimal to put it nicely

>>34522869
Missed the lower part, never had an issue with mine apparently an issue from a decade ago as I just got the upper barrel mag and bolt

>>34513294
Sounds like you need to move to america.

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>>34510088

a bullet specifically designed for fags who hate on AKs

>>34509393
There's no reason to run 300 without a suppressor, so that pretty automatically adds at least 600 dollhairs.

>>34525056
I was thinking of buying a decent 16 inch barrel in .300 as a dedicated hunting ar simply to have a more powerful cartrage that doesnt really need to go out past 200m. any opinions on what twist rate I should go for? also 300 is more stable than 5.56 because during the next panic it will go up in price more.

>>34525056
I would disagree, Home Defense/ Close Quarter builds dont necessarily need a suppressor and this is one area where .300 BLK excels. Some like a suppressor for HD but others dont.

>>34509192
But thats wrong
>>34518317
But that's even more wrong

>>34515741
The bullet will continue to accelerate as long as the gas from the powder combustion continues to be at high pressure. For most rifle calibers this will extend way beyond practical barrel lengths (36"+), and for .300blk it's well past 20".

However, you have to deal with diminishing returns. Past a certain length you're gaining negligible velocity.

Achieving full powder burn well before the end of the barrel means basically zero muzzle flash and a much quieter shot, as there is no active combustion and the gases aren't at peak pressure any more. This is good by itself with a bare muzzle but also helps suppressors do their job.

>>34522869
> implying it hasn't already caught on
> implying almost everyone in the ar game doesn't make 300

You want it to fail so bad it's almost funny if it wasn't so sad. Tell me where the 300 touched you anon

300 hate is almost always poorfags beeing poor

Options are good, variety is the spice of life

>>34521730
hello, fudd friend

>>34526524
just like with the piston in an engine, its not the force of the explosion that moves things, its the heat expansion.

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300blk is good for short barrels or hunting hogs suppressed.
Lrn 2 reload
Make good ammo like me...

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>>34527135

.300BLK is a shit meme with shit ballistics

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>>34527788

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>>34526415
you think 7.62x39 < 7.62×35???

>>34509386

That was EXACTLY what I was thinking. I went to the wiki page and saw that it had more energy than 556 despite less space to store powder and it fucking baffled me.

Thank you
>>34509439
and
>>34510106
for clearing up the confusion.

>>34526392
>Home Defense/ Close Quarter builds dont necessarily need a suppressor

Sure if you want to blow your kids' ears out, shoot unsuppressed 5.56 at the guy in their room.

>>34510106
>300 blackout is loaded with pistol powders, creating a much faster burn rate.

If pistol powder is more burn in less space, why don't all rifle rounds use it to save on weight? Is it more expensive?

>>34530249
>Sure if you want to blow your kids' ears out, shoot unsuppressed 5.56 at the guy in their room.

This may come as a surprise dear anon, but there are people on /k/ who don't have kids or a gf to protect.

>>34527121
hello elite operator ninja

>>34513280
hunting with 300blk is inhumane. With the exception of maybe small pigs.

>>34509184
Do you plan on running supressed?
If no stick with 5.56
If yes get .300 memeout and prepare to pay a fuckton for ammo

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>>34522869
>it will never catch on the way you are hoping

About 1/3 of the AR guys at my range range use 300blk. Pretty much every major AR manufacturer offers 300blk products, and they're selling... some manufacturers are even starting to sell integrally suppressed (one-stamp) uppers. Don't lie to yourself dude, 300 blackout is doing very well.

If you understand the cartridge... what it is (and more importantly what it is not), it's a great round. AAC took a gamble, rode on the popularity of the AR platform, and it paid off.

Rather than shilling against it, I highly recommend that you give it a try, especially if you have SBR or pistol lowers.

>>34531935
Not that guy but I don't like throwing a large hunk of lead downrange. I'd go for the smallest projectile at the most ridiculous speeds I can get it to. And then use some internal ballistics magic to make the 2mm projectile blow up like a grenade inside the target.

>>34531957
just depends on what you're trying to do. If I'm gonna use a gun for home defense, 300 blk allows me to do so without ruining my family's hearing, or mine. It also offers capabilities beyond your typical home defense pistol.

A lot of people use it for hunting smaller game too. I've been on several pig hunts, as they are an invasive (and sometimes dangerous) species in my area. Once or twice we've started shooting at a small group of them with suppressed 300blk, and they started running TOWARDS us because they didn't know where the shots were coming from. This resulted in getting all of the fuckers instead of just one or two.

>>34527202
Mama Mia. Those rounds. Pls post dead hog pics and other macabre wound shit

>>34509184
Lmao dude you're just going to be shooting a piece of paper just get 5.56. Cheaper.