Your AR Barrel Twist: Brief Explanation and History
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- Опубликовано: 6 сен 2024
- In this informative video, Reid Henrichs of Valor Ridge discusses barrel twist and what it means practically. #firearmtraining #firearmsinstructor #firearmstraining #secondamendment #military #foundingfathers
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Amazing video.
Do this video for AKs
I like listening to Reid. He has a way of breaking things down and explaining it in a way that everyone can understand and comprehend. Non-pretentious and not trying to impress anyone by making things overly complicated.
Same here.
And let's all pray for Paul Harrell. Affectionately I say the Bob Ross of the 2A community. Wealth of knowledge and a calming voice. God bless him and his.
*Harrell
@@thickseed thank you
I agree. With a rifle he’s a master. He’s like a skilled carpenter who can pick up any hammer and drive a tiny picture nail or a 16 penny framing nail with a single blow. I also enjoy frogman tactical. He’s got some really good info. There are so many consumer grade experts out there and in the industry. Those egos just aren’t helpful.
I'm all for "geeking out" on M-16/M-4 history.
Bring it!
Ya that history of the old guns would be awesome 👍🏻
More history please!!!
Reid is on FIRE!!! Thank you Sir, The world needs more Men like you in their lives.
Yes, history of the M16 would be great, thanks.
The original requirement that the military put out was for a .22 caliber center fire projectile that would do the same damage to soft targets (humans) as the 30-06 Springfield. Eugene Stoner was only able to achieve this with a 20” barrel and a slow twist that barely stabilized the bullet, as unstable bullets would yawl predictably and consistently. We have neutered the original capability behind the .223/5.56. Now 16” is considered “long”
All spitzer bullets will yaw around their center of mass (base) when entering a denser medium then air (such as tissue). The small caliber, high velocity (SCHV) test conducted in the 1950s found that by having a smaller diameter, lighter and fsster bullet this yawing would happen quicker, hence the development of the 5.56mm. A byproduct was that, if the velocity was adequate, when the round reached nearly 90° it would fracture at the cannelure of the bullet causing multiple would channels. That is where the reports of 'explosive' type wounds from AR-15s and later M16s during Vietnam came from.
The neutering of the AR and 5.56mm came about when the SS109 was introduced which due to it's mild steel tip, heavier weight and lower velocity tended to just pass through and remain together during yawing (as it was supposed to due to being a EP round). Then introduce the lower velocity of 14.5" barrels and now all the sudden Rangers and Delta are reporting ineffectiveness in Mogadishu during Gothic Serpent on malnourished 'skinnys'. The velocity problem was just made worse during the extended ranges found in Afghanistan. That was largely rectified by newer rounds like Mk262 77gr but rather then adopt that the Army is consistently weighing Armor penetration as more valuable then terminal effects on tissue so they get the idiotic M855A1 that required new mags and barrels replaced every 10k rounds and now they're receiving the M7 in 6.8 that doesn't do anything better then a 7.62mm Battle rifle. 🤷♂️
Would love to hear a history of the AR-15/M-16/M-4! Let’s do this!
Barrel length, history, I love it all and have since you started. Training with you is even better, and I highly recommend it. There is no substitute.
16 in barrel with a 1/9twist shooting 62 g green tip hitting steel at 300 with irons
Same. Mine shoots pretty much whatever I run through it.
I've got that rare 1/8. PSA had an absolutely killer deal on basic ARs with 1/9 barrels a while back and I jumped on it. Showed up with a 1/8 barrel. After a few moments of thought I decided that having an optimized long range 62 grain slinger is just fine.
1 in 8s aren't that rare, Faxon makes a bunch of different offerings in 1 in 8.
I was surprised to hear 1/8 is rare, my basic entry level ruger ar 556 came in 1/8. Great rifle but certainly not high end or custom
Definitely love these info/teaching videos. This is the reason I've been following you since I trained with you at Tactical Response. Love your teaching style.
55gr. for 1 in 9 twist...62 to 77gr. for 1 in 7 twist has served me well for forty plus years now. I still shoot 45gr. in my old Colt that is 1 in 12 twist.
1:12 shoots 55s like a dream. Nothing quite smacks like that.
@@twiggybones7040 Hi. Am not deep into guns, just a little shooting with both long and hand ones, but have been interested since youth. Knew about the spiral (rifling?) grooves to spin the bullet for stabilization, but never wondered about optimization. Here I learned about the relationship to bullet mass, and I don’t need to hear the physics of why.
Your word “smacks” makes me think you mean it is faster (1/12 with 55 grain) than that bullet spun up some. Makes sense, because increased rate of rotation involves energy, you could say it robs from the available kinetic energy.
Heck, now I AM interested in that mass-dependent stabilization parameter! ~8O
Cheers, Sir, and cheers Reid. And CompletePandemonium too.
@@johnnyliminal8032 the faster 1:12 will over stabilize the heavier projectiles, making them inaccurate. The slower 1:9 twist will better stabilize the heavier projectiles. Military arms channel demonstrates the 55gr 1:12 vs the other twist rates. You can undeniably see the difference.
Hi Reid, the 1-7 came about because the tracer round was so long and it was needed for stability.
Yeah, the 1/9 was developed for the SS109 but they needed the 1/7 for the tracer as it was longer to hold the pyrotechnic in the base.
I have plenty of 1/7 rifles, I bought a PSA blem kit, it had an FN 1/8 18" barrel I matched it with a Leupold scope...does pretty good but I only use 55 and 62 grain with it.
Hey Reid, a history on the M16/M4 would be great. Appreciate all the knowledge and information you give.
Please do a video about the history of the M-16
I read a dozen years ago, the low rate rifling was so that the tail heavy projectile would stop spinning and immediately turn sideways once it entered the enemy,,, causing more severe injury... the higher spin rates are more likely to pass through.. (Allegedly)
Reid was reading my mind. I recently put together an AR-15A2 clone using a 1:8 twist barrel, so I was the guy going, "What about 1:8?"
Oh, and it shoots MOA with M193 ammo with the Bear Creek Arsenal CHF barrel. (Yeah, I know a lot of you all don't want to hear that.)
I would love to hear about the original rifle twist............and maybe find one too show us maybe? To the Nam hands. Thanks for going and welcome home.
Supposedly,the 1/12 twist would have the bullet tumble on impact ,resulting in horrific wounds. This is said to be the reason that the Russians went to the 5.45 mm rounds in the AK 74.
Excellent educational
My pick is 1:8 twist rifling and .223 Wylde chambering for AR-15s. I think it has good performance with the widest variety of rounds.
Agreed!
Reid, on the note of history with the m16/m4/ar15. I would absolutely appreciate a video talking about iron sights. The history, development, and use of traditional sights and a second video built off of that looking at some of the fall out from that development. Especially regarding the differences (or lack thereof depending on the rear sights in question) of plane between aperture and zeroing sequences for these different sighting systems.
I zeroed a set of irons today. I spent 5 years in the US Infantry. (predominantly at 1-501 in Alaska) Throughout OSUT (basic and infantry training for those reading and unfamiliar) at that time (2014) we didn’t actually fire a single round through iron sights. We had a buis, but it was not used. During my time at my unit, I was never allowed the ammunition to zero my buis. I would get a co-witness if able (using a red dot, not possible with an acog) but that’s the best I was able to do. I understand, and agree with depending on context, the ideals of easy training with modern optics, but I feel irons allow for a more fundamental development long term for rifle and pistol marksmanship.
Many of us, at least myself, are circling back to learn these seemingly inferior systems as a matter of increasing our depth and breadth of understanding in this field. I would certainly appreciate more nuanced information on this subject in particular and I feel many men, new and not to marksmanship, would find this information helpful in this increasingly material world.
Shalom!
I would really enjoy a history of the M16 video
Excellent information, Reid. I love these videos. I’ve been subscribed for years. Always great work. I’d like a history from you on any weapon system. Thank you, brother.
They fought beyond the call, as my friend Bill used to say... He was an MP (152nd MP platoon) with 199th lib in Long Binh Vietnam fire base "black horse" 1969-70.
Back in the day, all the T/C Contender .22 barrels had the same twist: 1/12". Made their .223 barrels not like heavy pills, but their .22lr barrels would stabilize 60gr Aguila SSS as well as you could hope. Shame that munition has been discontinued.
Most of my AR pattern rifles are 1:8". I fire mostly m193 and m855. Because I buy by the case and this is more commonly found in those quantities. They group the same but m193 impacts slightly higher than m855 @ 100 yds but drops off faster. I also use Remington 62 grain solid copper hog hammer for game. Deer in the woods (100 yds or closer) feral pigs and coyotes. Between these 3 cartridges from my 1:8" barrels with trijicon ACOG or Primary Arms prism scopes with ACSS reticle there is no need to rezero between cartridges.
Excellent video. Legendary FN barrels 1:7 twist.
Mine chews everything from 55 to 77 with no issues.
Yes! I would love to see a video of the history of the M16 Rifle.
I know this is gonna be good from just the title 👍 Looking forward to the rifle history!
I love 1/9 20" is 👑
Delton barrel ?
My older Colt and I do have a Del-Ton as well. Never had any issues with them
@@JohnDoe-mt8rf
Yeah my 20 inch delton shot some horrible groups from factory so I did a crown job on it and now shoots very good even with cheap tula ammo
I would certainly be up for M16 history. Thanks Reid!
I watched an interview with Eugene Stoner about twist rates. He explained that the faster twist rates gave more penetration but less wound effect. He was against changing from a 1/14 to a 1/12 because it made the .223 bullet less effective in causing incapacitating wounds, at least with the fmj ammo.
God bless you Reid for all you do!!!
Thanks for showing your knowledge. Keep walking with our King
History of the M16 would be a great video!
I have an old DPMS MOE Warrior, 16” barrel with 1/9 twist. Never noticed any key holing with it. Great video Reid!
History of M16 please
Reid there are magazine length 80gr and even 85gr. Both will stabilize in 1:7 and I've never had a problem stabilizing 62gr M855 from a 1:9 over 5-6 different high quality barrels.
I’ll watch any video on this channel. Love the history stuff just as much as the training stuff.
M16 history? Hell yes. Ive seen alot of documentary on it. Id like to see Reid’s take on it.
Side note on Nam vets. My dad got to Nam in July ‘68 when Tet kicked off. 1st class gave him a M16 with a bandoleer. Dad said he didn’t know how to use it. Dad said he found an Ithaca Model 37 that he carried instead. Dad said he dropped the M16 in the Da Nang harbor.
Very good summary. I'll add that from my reading on the topic is that longer bullets typically require a faster twist rate for stabilization. A lot of the specialty military loads, including the SS109, are often longer than bullets of their particular weights typically are due to materials used being less dense than lead (in the case of the SS109, that would be the steel penetrator, obviously).
Definitely want to see a similar video in barrel length.
Yes sir please continue with the M16 history. Would love it. Keep it up with the knowledge transfer Reid. Great job.
I'd love to see a video about the history of the AR.
Please. I always enjoy a history lesson!
Trained with Reid a number of years ago, top shelf training from a top shelf dude. I highly recommend visiting Valor Ridge
Yes Please! M16 history vid would be great.
Yes sir, the history of these old weapons would be sweet
Would love to see a history of the M16/M4. Your a great teacher. BRING IT!!
Yes to ar15/m16 video! I'd also love to hear some of your old history lessons from your school days!!
If I’m not mistaken, they were running the 1/14 twist with stoners fast burning powder, the military end up, pushing out the rifles with the slower burning powder, which caused a bunch of malfunctions. The key to the rifle was the speed in which the powder burned and the twist
1 n 8, 68grn.
Reverse twist, left hand...
Yes do an M16 video and maybe a video on the 20" AR and why it's the best!
Love love this lesson!! I have a 1/9 16" on my M&P Sport. It was all I could afford at the time and it has treated me right. My "Gun Guy" friend said I should stick to 55 grain max because the twist would just tumble a 62. I have shot M855's (originally called SS 109 I think??) just fine with great accurately. I'm glad to see this video, Reid. Thank you!
It's like a different kettle of fish....love it
Yes for the M16 / M4 history video
Reid, love your presentations!! Such great information that many don't know and should. Thank you for educating us in a humorous and fun way. The AR15 Arctic Tests, could he an episode by itself how the Ordinance Board tried to sabotage Stoner's design.
I'd definitely get the popcorn for your M16/AR15 history presentation for sure!
Interesting. Ballistic details and related topics are always fascinating to me
I'm very glad you made this video, Reid, because I bought the 55 & 62 gr because it was less expensive, then the internet told me that weight is too light for 1:7 twist. I thought about changing barrels or selling ammo.
Great information!
Reid, definitely would love the M16 history by you! 👍🏻
Great video, thank you sir and heck yeah let's nerd out on the M16/AR15.
Hey Reid, loved the video content. Please keep making these types of educational and historical videos. 👍🏻
Definitely would love a history of M16 family and barrel length considerations.
Yes to history of m16, and rifles in general, and firearms in general, and weapons in general, and history in general. Please.
Would love to geek out on the history of the M16 AR15 rifle Reed! With you as the instructor.
That’s be awesome. Do a documentary on the AR platform. I’d like that.
We need more of these videos.
Ive strickly used 55 with a 1/9 and seens great!
I switched over to 77gr(black hills TMK for home/self defense) years ago, and it's almost the best of all worlds, and it's especially great for shorter barrels. I've seen gel tests from 10.5" guns with velocities around 2750fps(which is Black Hills' advertised velocity.) I've gotten similar results from my HD gun, which due to state laws(don't ask) has a 12.5" barrel, with a 1/7 twist(actually, I think every 5.56 gun I own is either 1/7 or 1/8.)
Really happy to have found your channel. Always excellent info presented in a solid, down to earth way.
Thanks Reid!
Hi Reid, I'm all in for an M16 history/breakdown if you get time to do it. Thank you for making all of this information available to us.
Thank you for your service!
My 1:7 LOVES 77gr. Razor Core
Thanks. It seems no one has just gone through the twist rate like you just did. Now we know it's not all smoke and mirrors. Great job Reid.
Great stuff. Reid!
Don't forget about the 6.5" twist rate also. I believe it stabilizes up to 95gr.😊
Great video Reid. Very informative. Good job!
Thanks, Reid!
Can do a video on Barrel length? What's the best length for home defense. And what the best length for combat use. And ammo grain for each one. Thanks!
AR history video? What’s not to like? I’m in! The history of the screwups with powders and weather related chamber problems are amazing that they got all sorted successfully.
I would like to see Reid geek out on the M16/M4, as it could go “into the weeds” in regard to barrel twist compared to barrel length.
do you personally have a preference between 62g and 55g?
A video on the history of the M-16 would be great.
I mainly run the cheaper 55gr stuff and it runs nicely in my 1/9 twist Windham Bushmasters including my HBAR!
Yes Reid, please do an M16 history video. Thanks.
My POF renegade plus has a 1/8 twist rate. Great video.
Great explanation. Thank you
Yes I would love a history series of the m16. I know nothing about it.
All 2 of my AR platform rifles 1:7 twist, double chrome barrels with the M4 feed ramp. I'm good.
Awesome info as always. Semper Fi Reid! Knew most except the original barrel twist of of 1:14, always thought it was 1:12. Vietnam showed that the 1:12 w/ 55 gr M193 was a nasty round. Always willing to learn something new! Really wish I could get down there for a couple classes, but it’s a rough drive with all the titanium pins, rounds, and plates putting me back together, and I hate flying even with a Drs note the flippin TSA treats me like a terrorist going through security, and that’s not even checking firearms in a carry on. Have seen the dam images on their screen when I get yanked for a feel up session, and they are unmistakable that they are medical hardware🙄🤬!
I have all 1:7 barrels just so I can shoot 55s, 62s, or 77s. Mine are zeroed w/ 62 gr MK 318 mod 1 SOST, and train with 62 gr M855 unless it’s a range that doesn’t allow them then I use M193. Now my SPR which I only run MK262 OTM 77 gr out of except for training I will use IMI 77 gr OTM which is pretty decent, but not as consistent/tight as the MK262/Black Hills. The IMI is like .90-.95 cents round compared to actual MK262 which is $1.40-1.50 a shot. The M855 is .45-.50 cents a shot vs the Mk318 Mod 1 which was like .75-.90 cents a round when I stocked up but now is almost impossible to find and if you do it’s around $2 a shot so I just buy the MK262 now, but still have an ok amount of Mk318. Have actually thought of selling off my 318 because it sells like gold🤣, and replacing it all with 262.
Got a Savage model 24 in 223 with a 1:14 barrel, will stabilize 55gr but barely. Prefers 45gr sporting stuff.
AR and AK-101 clone w 1:7 does great with everything, including 55 gr.
M16 history lesson would be great.
Yes please do the history on the m4 and m16
I would certainly appreciate the history lesson, Professor Reid.
Excellent.
HIStory has always been my favorite subject .
I would love to see the history of the M16 and any other firearm you would like to make a video on.
I like the technical stuff especially being a hand loader. I have a couple 1/8 twist barrels and they like most grain weights but they love 70gn bullets the most.. I the history of the M16 would make a fun video!