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คำหลักเกี่ยวข้องกับหัวข้อdwell time คือ.
#Gas #Systems #Lengths #Dwell #Time
[vid_tags]Gas Systems Lengths and Dwell Time
dwell time คือ.
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Dwell time is the time between the bullet passing the gas port and exiting the barrel.
It does not have anything to do with the time from ignition until reaching the gas port.
That may be an important consideration but that is not Dwell time.
Good info. I decided to change the hand guard on my 300bo. It has a pistol length gas tub?? What the heck. I have a # of builds and an original Colt ar 1964 model. My new 300 seems to spit the brass out hard enough to bend it on the brass deflector. So I started looking for some way to change this.. Anyway I found out that most of the gas build up is after the bullet goes by the hole in the gas block. Therefore as he says the longer the barrel after the gas block the more pressure build up to a certain point and then opposite.
But when one goes from a 223 with 55- 60 gr. bullets to 150 grain plus bullers with much the same case behind it things change a lot.
What weight buffer, and what kind of buffer spring did you use? I’m working on building a 300 blackout like this with 16” barrel pistol length gas system and haven’t been able to find a good answer in any videos. Thank you
Very well explained
I DO NOT forgive your profuse sweating during this video.
–Amateur !
If you're going to be broadcasting yourself on a worldwide media internet platform (except in countries that censor American firearms videos, to discourage their captive citizens from ever dreaming of owning a gun) then you need to appear presentable. Otherwise, you're just broadcasting 'shame'.
I expect you to make appropriate air conditioning arrangements prior to your next video.
And –oh yeah… Don't over-dress, there, buddy.
Ever hear of a tuxedo??
Look into it.
Another BIG issue in gas impingement guns is extraction timing. Too short of system has the casing being extracted when the neck is still expanding making it difficult to expand the spent casing. So there is dwell time, extraction timing, bolt mass, buffer mass, and gas regulation that needs to be performed to tune the rifle or pistol.
Very clear easy to understand explanation!
Pull out Quicker or you got Dwell time and issues can happen.
Appreciate the intel feed back.
Why people try to push extra velocity out of a cartridge designed to be subsonic is beyond me
How similar are the pressures of 7.62 × 39 and 300 blk out?
With 7.62 and a 16" barrel is a carbine length gas system a good design?
Very sure you got this wrong
Dwell time is the amount of time
AFTER the bullet PASSED the gas port !
That dwell time govern how long the gas is sent back to the BCG thru the gas tube
On 16 inch barrel
The carbine gas length has LONGER dwell time
The mid gas length has shorter dwell time
24 inches is stupid
Just get an adjustable gas block with bleed off feature…problem solved
So a shorter gas system is bad because it can't build up enough to push the bullet out???
Ok, is anyone else wondering what the deal is with that monster recoil reducer hanging on the end of that barrel?!? PLEASE tell us about it!
New to the ar world originally ak guy I was wondering if someone knows what butt stock is on his rifle
I'd like to know which is best for recoil management since the 300 Blackout is not good with nor does anyone make a mid length barrels. Is the carbine or pistol gas system in a 16in barrel
Sweet Rifle and a Great Rifle!
THANK YOU….I BEEN WANTING TO KNOW THIS INFO !!…MUCH APPRECIATED
Thanks! I have the same gas length and barrel length as yours and worried about the same things. This video helped clear that up for me.
Wanted your opinion about what I’m planning on doing. I have an older AR-15 (mid 80’s) and I’m wanting to convert it to .300 blackout. Through my looking and research 16” barrel and pistol length gas system seems pretty common. In your opinion would this be an ok conversion? Or do you think it might not work well with my lower? I’m just researching and getting as many opinions as I can. Thank you.
I admire your enthusiasm.
Good video, but you're right and wrong. You're correct in what the term means as a general Firearms principle, but in relation to AR style guns in particular "Dwell time" is the length of time from when the cartridge passes the gas port until it leaves the end of the barrel.
Is not the around time before the bullet gets to the gas port, and it's not the entire amount of time it's in the barrel. It's only post – gas port to muzzle.
That's because dwelltime represents the. In which there is enough pressure to force gas down the gas tube and pressurize the cycling mechanism of the rifle.
Before the bullet reaches the gas port, obviously there's no gas going down the gas tube, because it's all behind the bullet. And obviously, once the bullet leaves the barrel, then no more gas is Flowing down the gas tube since it will instead take the path of least resistance which is out of the muzzle. So the only time the gas tube and the entire cyclic mechanism (gas key, bolt carrier group, etc) is pressurized enough for gas to flow into it, is once the bullet passes the gas port (therefore for exposing it to the expanding gases) and before it leaves the barrel (therefore uncorking the entire system).
How dare you sweat on camera! lol – good video buddy – thanks for all you do
I'm looking to do an 18inch upper in 5.56 NATO. I'm still some what confused
Doesn't the buffer and the tension of the buffer spring play into the equation? Depending on the length of the barrel, how do you know how what diamater gas to you need to ensure flawless operation?
12.5 barrel 223/556 mid length gas system vs carbine which one would be more reliable
All 16 inch 300 Blks with pistol length gas systems will be over gassed. Adjustable gas block is a must if you shoot a lot. 8.5 inch will not be over gassed.
The only dwell that will cause you to be under or over gassed is the distance after the bullet passes the gas port and exits the barrel and gasses exit the barrel….
This video is completely false. There's so many false information Within this video point them out. Delete this video get your facts straight and then redo this video. You are getting confused with with multiple things like what is actually the dwell time and what is Barrel time and what is Optimum barrel length and you missing the completely point of the placement of the gas port. In this video sounds like you're wrapping all of these definitions up to one definition of dwell time which is completely wrong
BRO, you got it totally wrong!!! Dwell time is how how long our California Politicians Dwell on fucking us out of our rights
I tried to put a rifle length gas tube on my 7” pistol… lol
Would it make much of a difference with a 10.5" barrel
So what buffer do I need for a 20 inch barrel with a rifle length gas tube and a carbine stock? I am thinking start with a standard buffer and go from there.
If you do excessive research on the 300 round and gas systems. A pistol length system is the way to go. It will run flawless. Especially in a short barrel setup. Because the round was engineered for a short barrel rifle.
Im wanting to do an 18 inch rifle "SPR" type build. My problem is that I want to do a mil spec carbine buffer tube so I can have an adjustable stock. I have seen people have a lot of problems with them. Would getting a mid length compared to a rifle length help? Or are there certain buffer springs and buffers I should invest in?
AR 9mm- can a short gas block on a custom long 16-24" barrel
give enough low pressure 9mm dwell power to cycle a GasDI ultralight BGC & Buffer ?
Why GasDI 9mm instead of blowback? Lighter gun, much lighter than extra heavy bolt/buffer for extra long 9mm barrel.
This is not the first time I said this but,
Wrong, wrong, wrong! Everything you said is wrong, and I am offended by everything you said. This is also racist, sexist, and bigoted.
Yes I'm that guy!
Just joking man great review, helped me out big-time.
What handguard is that?
Exactly what I needed. I was completely clueless before. Thank you
Great video. I am building a 10.5 inch SBR 300 BLK Out. And I purchased a completed upper. I was wondering why it had a pistol length gas system, when all of my other 223 10.5 inch SBR's had carbine length gas systems.
what is better for 6.5 grendel ? 20" 1×8 twist and rifle , or 18" 1×8-5R and mid lengths ?
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