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Question about the 300 blackout..
Posted on 12/11/16 at 3:11 pm
Posted on 12/11/16 at 3:11 pm
What is the actual average muzzle velocity on those?
I figure it has to be about the same as a .22 LR.
I figure it has to be about the same as a .22 LR.
Posted on 12/11/16 at 3:26 pm to auggie
Well subs will obviously be around 1070-1100fps, supers are around 2150-2250
Posted on 12/11/16 at 3:58 pm to Carson123987
quote:
Well subs will obviously be around 1070-1100fps, supers are around 2150-2250
is there some hidden thing that makes them popular right now? Other than being something new?
Posted on 12/11/16 at 4:34 pm to auggie
It was designed to be a subsonic round. My SBR with a 9inch barrel, jp capture spring, and omega suppressor is stupid quiet. The capture spring really quites it down a lot. Really the only thing you hear is the bolt going back and forth. I am shooting 220 gr Hornsby super performance with 11gr of accurate 1680. I am at about 1000 ft per sec.
Posted on 12/11/16 at 4:48 pm to auggie
It got approved by saami a few years back which made it take off like crazy.
Otherwise it was better known as 300 whisper. Little changes made it the blackout.
Being approve by saami meant there was a standard. 300 whisper could have different reamers and specs because there was no standard.
Plus the big machine picked up 300 blackout and with tons of marketing behind it you see what happens.
Similar rounds have been around for a long long time before the blackout became popular
Otherwise it was better known as 300 whisper. Little changes made it the blackout.
Being approve by saami meant there was a standard. 300 whisper could have different reamers and specs because there was no standard.
Plus the big machine picked up 300 blackout and with tons of marketing behind it you see what happens.
Similar rounds have been around for a long long time before the blackout became popular
Posted on 12/11/16 at 5:25 pm to auggie
Well there are a few things. I'm not really sure why people freak out about the subsonic round other than it's fun to plink around with something that is so quiet.
To me supersonic Barnes 110gr bullets make a whole lot of sense out to 250ish yards. The number one reason I like and utilize the round is in my homedefense setup of a 9inchh barrel with my omega on the end of it. So I now have a round that is quiet enough inside of my house that I'm not blowing my eardrums out all while still running with about 1100 foot pounds of energy. About three times that of a pistol and a few hundred more than a 10.5inch sbr in 556. I think just because of its increase of power over the 556 it wins out almost no argument at anything within 200 yards. Where it begins to be outdone by 556 is around the 300 yards mark where t really starts to slow down and drop off.
It can even be setup as a great pig gun and I think a much better option for those ppl who like to deer hunt or let their kids deer hunt with their 556.
To me supersonic Barnes 110gr bullets make a whole lot of sense out to 250ish yards. The number one reason I like and utilize the round is in my homedefense setup of a 9inchh barrel with my omega on the end of it. So I now have a round that is quiet enough inside of my house that I'm not blowing my eardrums out all while still running with about 1100 foot pounds of energy. About three times that of a pistol and a few hundred more than a 10.5inch sbr in 556. I think just because of its increase of power over the 556 it wins out almost no argument at anything within 200 yards. Where it begins to be outdone by 556 is around the 300 yards mark where t really starts to slow down and drop off.
It can even be setup as a great pig gun and I think a much better option for those ppl who like to deer hunt or let their kids deer hunt with their 556.
This post was edited on 12/11/16 at 5:28 pm
Posted on 12/11/16 at 5:30 pm to kengel2
My 300 blackout won't cycle those Hornady 208 grain cartridges. It cycles supers just fine. I haven't gone through the process of doing the SBR so I'm shooting a long barrel. I've heard that I might need to get a different spring in the buffer tube as I don't have an adjustable gas block. Any suggestions are welcome.
Posted on 12/11/16 at 5:35 pm to Big L
Are you running a suppressor? A lot of guns won't cycle subs without having a suppressor adding more back pressure.
Also an adjustable gas block won't do anything in your current situation. The adjustable gas blocks are more for situations where your gun is overgassed. You're most likely underpasses at the moment. A lighter buffer or spring could do the trick but you will have more violent recoil when shooting supers.
Also an adjustable gas block won't do anything in your current situation. The adjustable gas blocks are more for situations where your gun is overgassed. You're most likely underpasses at the moment. A lighter buffer or spring could do the trick but you will have more violent recoil when shooting supers.
This post was edited on 12/11/16 at 5:38 pm
Posted on 12/11/16 at 5:36 pm to Big L
You can either look at the adjustability of the jp spring system but they are a little bit expensive. You wouldn't be changing the spring in the stock but more likely the buffer weight. When I was building my 16inch 300 black I ended up drilling out the gas port in the barrel because that was my limiting factor in the gas system since my adjustable gas block was already maxed out and it still wouldn't cycle suns perfectly. Now most people will not have to go that far.
Posted on 12/11/16 at 5:37 pm to 03GeeTee
Yeah that was my issue it would run it with a suppressor but I said eff that I want mine to run no matter what.
Posted on 12/11/16 at 5:40 pm to Timmayy
Yea lighter buffer might work then. But it will have more felt recoil when shooting supers suppressed though most likely.
Posted on 12/11/16 at 6:06 pm to 03GeeTee
I am running a suppressor. I think a few of the times it didn't even reset the trigger, so it's obviously not going back far enough. What's weird though is that it would sometimes load a super if it was the next round after a sub, so perhaps it's got something to do with the cartridge.
Posted on 12/11/16 at 6:22 pm to Timmayy
quote:
The number one reason I like and utilize the round is in my homedefense setup of a 9inchh barrel with my omega on the end of it. So I now have a round that is quiet enough inside of my house that I'm not blowing my eardrums out
This is a very odd thing to be concerned about.
Posted on 12/11/16 at 6:36 pm to auggie
This article has a bunch of chronographed loads, both factory and handloads, in both carbine and pistol length barrels. "Loading the 300 Whisper"..
Back in '01 I bought a 12" Contender barrel in 300/221 (it was a "300 Whisper", but couldn't be labeled as such as it wasn't made by SSK Industries.) JD Jones was the legendary gunsmith/shooter who owned SSK Industries and developed an entire series of "Whisper" cartridges. The cartridge was designed for self-defense/tactical uses in the AR 15 platform using either sub or supersonic loads. Unfortunately, this was before the AR craze. He copyrighted the "Whispers", but didn't submit them for SAAMI specifications. None of the big arms makers got behind the 300 Whisper. The 300 Blackout was developed at the perfect time w/ the AR craze and also had the support of Big Green.
My barrel has the proper fast twist (1:8") to handle both sub and supersonic loads, but I bought my to hunt w/ using supersonic loads. I've killed 2 whitetail deer w/ mine. My barrel pushed 125 gr Nosler BT's to 2250 fps and 130 gr Single Shot Pistol bullets (discontinued yrs ago) to 2200 fps. W/ the proper loads, the 300 Whisper/300 Blackout is a nice 200 yard deer gun w/ minimal muzzle blast and recoil. I even had a 20" Contender carbine barrel built to be my son's first deer gun. It's been a few years since I've hunted w/ it. Whenever I shoot it, I'm amazed how much velocity the supersonic loads get from only 17-18 grains of powder. I'd be hard pressed to find a better starter youth gun than a AR 15 carbine w/ adjustable buttstock chambered in 300 Whisper/300 BO.
Back in '01 I bought a 12" Contender barrel in 300/221 (it was a "300 Whisper", but couldn't be labeled as such as it wasn't made by SSK Industries.) JD Jones was the legendary gunsmith/shooter who owned SSK Industries and developed an entire series of "Whisper" cartridges. The cartridge was designed for self-defense/tactical uses in the AR 15 platform using either sub or supersonic loads. Unfortunately, this was before the AR craze. He copyrighted the "Whispers", but didn't submit them for SAAMI specifications. None of the big arms makers got behind the 300 Whisper. The 300 Blackout was developed at the perfect time w/ the AR craze and also had the support of Big Green.
My barrel has the proper fast twist (1:8") to handle both sub and supersonic loads, but I bought my to hunt w/ using supersonic loads. I've killed 2 whitetail deer w/ mine. My barrel pushed 125 gr Nosler BT's to 2250 fps and 130 gr Single Shot Pistol bullets (discontinued yrs ago) to 2200 fps. W/ the proper loads, the 300 Whisper/300 Blackout is a nice 200 yard deer gun w/ minimal muzzle blast and recoil. I even had a 20" Contender carbine barrel built to be my son's first deer gun. It's been a few years since I've hunted w/ it. Whenever I shoot it, I'm amazed how much velocity the supersonic loads get from only 17-18 grains of powder. I'd be hard pressed to find a better starter youth gun than a AR 15 carbine w/ adjustable buttstock chambered in 300 Whisper/300 BO.
Posted on 12/11/16 at 7:01 pm to auggie
quote:
there some hidden thing that makes them popular right now?
Most popular cartridge that nobody needs to solve a problem nobody had.
Posted on 12/11/16 at 8:49 pm to Clames
Nobody really "needs" an AR either, but they are fun. I personally like being able to hear the thump of the bullet hitting a pig. It's also really interesting and a bit scary to hear the ricochet noises.
Posted on 12/11/16 at 10:54 pm to Big L
Got my son one in a Ruger American. 4 pigs and a 6 pt so far in 3 weeks and none have taken a step.
Posted on 12/11/16 at 11:20 pm to UpToPar
There is a reason most swat teams have made the switch. go to an indoor range and take off your earpro. Now just imagine that with a high power rifle. I would say a suppressor is a very good fit on an sbr in the home.
Posted on 12/12/16 at 1:02 am to auggie
Lets see..
1. Ability to put more energy on target than 5.56 (supers comparable to 7.62x39) at ranges up to 300 yards, out of an 8 inch barrel.
2. Switch from subs to supers with nothing more than a mag change.
3. Shoot 220 grain subsonic bullets with a can so quiet that all you can hear is the bolt sliding.
4. Easy to convert bulk available 5.56 brass into 300 BO cases for reloading.
5. Capable of shooting a wide array of readily available .308 bullets all the way from 110 gr to 220 gr with no loss of reliability.
6. Easy shooting, minimal recoil, compact (with 8 inch barrel), perfect PDW.
Personally, I prefer the ballistics and availability of 7.62x39, but I hate the AK platform. This is the closest thing to 7.62x39 from a ballistics standpoint that is functional in an AR.
1. Ability to put more energy on target than 5.56 (supers comparable to 7.62x39) at ranges up to 300 yards, out of an 8 inch barrel.
2. Switch from subs to supers with nothing more than a mag change.
3. Shoot 220 grain subsonic bullets with a can so quiet that all you can hear is the bolt sliding.
4. Easy to convert bulk available 5.56 brass into 300 BO cases for reloading.
5. Capable of shooting a wide array of readily available .308 bullets all the way from 110 gr to 220 gr with no loss of reliability.
6. Easy shooting, minimal recoil, compact (with 8 inch barrel), perfect PDW.
Personally, I prefer the ballistics and availability of 7.62x39, but I hate the AK platform. This is the closest thing to 7.62x39 from a ballistics standpoint that is functional in an AR.
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