Why AR-15 twist rate does not matter w/ stability | accuracy. Pt 1.

Ar 15 Got accuracy? Does twist rate really matter in the Ar 15? What is the best Ar 15 barrel twist rate? In this Video, I'll discuss Ar 15 (5.56 nato /.223 Rem) twist rate (1-7, 1-8, 1-9) and bullet stability | accuracy. I will also discuss the practical accuracy and the three common internet myths regarding twist rate and stability | accuracy. I'll also do a shooting demonstration at 100 yards (short range) and 568 yards (mid range) to prove the concepts I talk about in the discussion portion of the video.

[@sickboy703]

My 1-7 twist 20 inch is by far my favorite. Qualified expert with that barrel in 1987. Granted, seeing 300 meters ain't as easy as it was back then lol

[@PracticalAccuracy]

Lol. I prefer the 20 inch barrel as well. I wish my eyes were younger too. Thanks for watching.

[@ph03nixflame]

I love this content! Great stuff, it's unreal how rare it is to find this kind of side by side comparison on KZbin. An easy slam on that subscribe button!

[@PracticalAccuracy]

Thank you. Glad you enjoy.

[@CanVultus]

Dude I can watch someone shoot rifles for hours. If I’m not shooting I’m watching lol.

[@PracticalAccuracy]

I can only do it if I'm spotting. lol Thanks for watching.

[@Ratlstrap]

Been hitting videos and forums like crazy trying to figure out exactly what twist rate and length i need for my AR build. Still looking at an 18" 1:8, probably will be shooting mainly 62-68 gr fmj, of course ill still put 55 through it for training and plinking but this puts me more at ease knowing I'm not gonna just spit lighter loads at targets

[@PracticalAccuracy]

Glad it helped

[@hartsickdisciple]

Thank you! I've had people tell me my 1-7 barrel needs 62 grain or heavier bullets, but my experience has been that this is false. My gun shoots 55, 50, and even 42 grain bullets in sub 2 MOA groups. It does well with 75 and 77 grain bullets as well, at least out to 300 yards.

[@PracticalAccuracy]

Good to hear. I believed the same thing for years until I started independently testing ammo. Funny thing is I still get people arguing with me even after they see my videos. Thanks for watching.

[@smokingcrab2290]

Does twist rate have an effect if the barrel heats up? I noticed after a one mag, my AR's zero changes.

[@angry_zergling]

If you search for different videos on youtube, you will find 1:9s shooting 75s or 77s to 500+ perfectly. In others, you will someone shoot a 75 from 1:9 at a target ten feet away and it will keyhole. There are a few variables that explain this: Elevation: the higher the elevation, the more stable a given bullet at a given velocity will be. A bullet on the edge of stability will be quite unstable much quicker if you drop from 2,000 above sea level to sea level. Temperature: the higher the temperature, the more stable. A marginally stable bullet at 100 degrees will lose stability much sooner at 70 degrees. Barrel variance. Between manufacturers, and even within them, a '1:9 twist' is not always really 1:9. Some 1:9s measure closer to 1:8 than 1:9 (example, stamped with 1:9 but it measures 1.84) and some measure closer to 1:10. The 1:84 '1:9' might slang 75s with no issue. The 1:9 '1:9' might be stable for a hundred meters or two, marginally stable for another hundred, then unstable beyond that. The 1:98 '1:9' might not be able to reliably stable 69 grainers and keyhole them if the target is more than a hundred yards away. Lotsa variables. Just because one gun shot at one place fires heavies fine does not mean another very similar gun will be able to. (I have a 1:9 twist AR and went through a period of remorse where I was sad because I was told I couldn't fire >69 so I did TONS of research - fiddled with online calculators that where you can input bullet length, weight, elevation, temp, twist, velocity and see how a few seemingly small changes in any one variable can have a huge impact on stability.) Also - don't worry about firing 75s or 77s unless you're looking for high BC stuff for long range. If you want the bestest terminally effective bullet of all, it isn't a 75 or a 77. It's a 50. 50 TSX, baby! (Only somewhat my opinion. In gel tests its terminal performance is objectively among the best.) And the best thing about a 50 grain is that all of us - the teenage 1:7, the generation alpha 1:8, the millennial 1:9, or even the grizzled baby boomer 1:12 - all can fire a 50 grain and needn't be concerned at all about stability.

[@jmmartin7766]

@@PracticalAccuracy Facts are facts, right?

[@hotchihuahua1546]

You and I went through the same think when I first got started with my AR15 . I think people mean well but every gun and barrel favors a certain round . A 300 yard maximum distance is my benchmark within a kill zone in a hunting situation on hogs and coyotes .

[@timsaxer6442]

@Practical Accuracy. It's great to see someone show that low power scopes are capable of very good groups.

[@PracticalAccuracy]

Thanks. I'm glad you enjoyed.

[@michaelparker2796]

You did a great job. I own a Colt M4 with a 14.5 barrel with a 1/7 twist. I use Frontier 5.56 55 and 62 grain with great accuracy. Right around 1/2 to 3/4" spread at 100 yds. Your videos are very informative and you are very good at letting everyone know about the AR, Barrel Length, Bullet size and grain. Thank you. Michael

[@PracticalAccuracy]

You are welcome

[@raymondj8768]

Great videos no bullshit strait to the point and a very good job laying it out so its easy to understand BRAVO !

[@PracticalAccuracy]

Thanks for watching. More Keep it simple videos on the way.

[@alejandroflores-samaniego9320]

all my rifles are 1:8 all shoot great, building one right now with 1:7 but that’s because i only found 14.5 inch barrel in that twist. i use them for comp and so far so good, all perform very good and i build them to work hard. great video

[@PracticalAccuracy]

Thanks. I also have a 1:7 14.5 inch colt barrel for a build. I hope it shoots.

[@BrewCityRider]

Excellent demonstration to dispel these ridiculous myths. I shoot IMI 77 grain SMK BT HP's all the time in my 16" 1:9 twist with great accuracy. I'll be checking out part 2 next. Thanks.

[@PracticalAccuracy]

Thanks for watching.

[@jorgesolis9468]

How accurate is the question because with my 16 inch 1:9 I get penny size groups at 100 on a great with hornady 55 gr frontier fmj while 75 gr bthp frontier from the same gun and everything my groups spread to 4-6 inch groups

[@BrewCityRider]

@@jorgesolis9468 I can't comment on 100 yard groups because my range only goes out to 25 yards. So at 25 yards I am putting them in or near the same hole. Good enough for my needs.

[@jorgesolis9468]

@@BrewCityRider yes well I hog hunt and shots vary from 10 yard up to 300 yards so I from expierence know that the twist rate at 100 yards and further does mean something and I am getting a 1:7 barrel as soon as I can to run my favorite rounds for pigs specifically because the difference of 4 inch groups and a penny size group at 100 means something to me and others

[@BrewCityRider]

@@jorgesolis9468 Yes, I can certainly understand why you need tight consistent groups at 100 yards. Well, this video just showed us that two of the 1:9 twist barrels he used were sub MOA and one was just over.

[@tirsogonzalez199]

I have always argue this with a freind. I shoot 77 nosler with my S&W mp at 100 yards with excellent results. Am gonna send him your video right now. Thanks great video.

[@PracticalAccuracy]

Thanks. Glad it helps you.

[@paralyzdtheory]

1:12 twist w/ 55gr out of a 20" barrel causes instant tumbling when it hits something. Its like a bomb going off when it hits the target. I think our tighter twists are causing more ice picking

[@PracticalAccuracy]

I have heard that also. I'd like to do some testing. trying to get a 1:12 twist to see what happens.

[@corycarlson8712]

The chopping block KZbin channel did a test on this and twist rate had zero effect. I used to believe the same thing. Do a search on his KZbin channel from a couple months ago.

[@PracticalAccuracy]

@@corycarlson8712 thanks. I'll check it out.

[@paralyzdtheory]

@@corycarlson8712 could you reference the video. I tried looking through all his yt videos, but could not find one

[@corycarlson8712]

@@paralyzdtheory he might have published it under arfcom also. It was within the last 12 months I'm pretty sure.

[@rdsii64]

If you get a barrel with a 1 in 8 twist, you can stabilize anything that will fit in a magazine. With that said, the problem with the 9 twist issue is that some barrels marks as 9 twist barrels, are actually 8.5 twist barrels. That is the reason for the controversy. A True 9 twist, will give you issues with 75/77 grain bullets. You may get round shot holes, but your groups will be horrible. The last 9 twist Rock River Arms rifle I owned, had a measured twist rate of 1 in 8.5. It shot Mk262 very well. Measure your ACTUAL twist on barrels marked as 1 in 9 and see what you get. I bet you best shooter with 75/77 grain bullets might just be 1 in 8.5.

[@PracticalAccuracy]

I did measure the 16 inch barrel. I took 3 measurements and got between 1:8.75 and 1:9.125. thats as precise as I could do it. I did not measure my other guns, but I have heard that the rifling can be off from the manufacturer.

[@AFSWAT]

I respect the grind when you have the competition calling in bomb threats because they can't keep up. Keep up the good work, the sound of the haters has a nice ring to it 💪😤 💯.

[@PracticalAccuracy]

Thanks for the nice comments. Hope the video helped.

[@billyfreeman5803]

I find it crazy that consumers are always after the 1:7 twist barrels and yet the most common ammo on the market is M193 or M855. I have plenty of 1:7 barrel builds but I'd rather make 1:8 or 1:9 barrel builds. It's not even a matter of being in stock. They're just almost impossible to find. Anyone know of a 1:8 twist 16" 4150CMV Nitride/melonite barrel with a properly sized mid-length gas port?

[@jmartin9059]

*Palmetto State Armory offers the 4150 CMV Carbon Steel Barrels {sometimes nitrided/sometimes parkerized/ occasionally chrome lined} ... IF YOU WANT THAT. I prefer Wilson Combat STAINLESS MATCH GRADE. 1:8 are commonly available... in 223 Wylde or 5.56 ... Wilson Combat sometimes offers 5.56 in 1:7, as well. Lothar Walther have recently started offering AR barrels. German made & sometimes stocked in USA warehouse ..and, might be worth having.*

[@fishersofmen4727]

PSA makes one 16inch with a 1:8 twist but not with that barrel and a carbine length gas system.

[@rbm6184]

Billy Freeman Check out Del-Ton (DTI) that usually has mid length 1/9s but BCA or Bear Creek Arsenal have 1/8 and 1/9 in various gas lengths. But the barrels most likely are 4150 CMV (Chrome Moly Vanadium). Del-Ton barrels are Manganese Phosphated 4140 CMV.

[@spicychich1718]

For your last sentence you should look into Criterion barrels. Specifically their 223 Wylde hybrid or core barrels. Your description is spot on with what they have and are VERY accurate. Lastest price I saw was $280-300 on back order.

[@_EZ710_]

Aero precision has a 1 in 8. 16" barrel

[@jmmartin7766]

The military tends to go "middle of the road" with the equipment they issue to regular troops-- not that it's bad, it just may not be "the best." With something like "rifle twist rate," they want the widest range in bullet weights possible to work in the gun with decent results, to make logistics easier. As a former soldier, I can't hate that

[@PracticalAccuracy]

Thanks for the comment and I hope you enjoyed the video.

[@jmmartin7766]

@@PracticalAccuracy I did, thanks

[@michaelbarfield528]

Great video!!!! Very informative and extremely detailed information presented in a clear and concise format..... BZ from a retired U.S. Navy veteran .

[@PracticalAccuracy]

Thank you. Glad you enjoyed the video

[@rgwilliams2547]

I agree! My experience with weight and twist and accuracy have more to do with powder burn rate than twist rate.

[@PracticalAccuracy]

Thanks for the comment

[@evanknight5818]

Hi, thank you for your informative videos, they have been very helpful. I was wondering is it okay to have an 11.5 to 12.5 inch barrel with a 1:9 twist, will this cause problems of any kind. Thank you for your time and help.

[@PracticalAccuracy]

I don't own these barrel lengths to test, but generally I think 1:7 twist is the standard for that barrel length. Hope this helps.

[@evanknight5818]

@@PracticalAccuracy I understand, Thank you for your time and help.

[@joesinegal8167]

AZ Trigger Here On KZbin Shot Some 75gr 5.56 Ammo With A Smith & Wesson M&P Sport II With A 16" Barrel With A 1/9 Twist Rate And Got His Best Grouping's In A Comparison Of Different Bullet Weights. It's Great To See Someone Else Myth Busting The Old Twist Rate Argument! Thanks For The Excellent Video/Content! ✌️🇺🇸✌️😎

[@PracticalAccuracy]

Thanks for watching. I'll check out the video.

[@joecantu2920]

Some can shoot heavy projectiles. With 1/9 twist you have to shoot and see, that’s what it comes down to it. Test your ranges out as far as you can, then you know. 1/9 shoots sub 55gr to the upper high 60s very good and sometimes 75gr too.

[@PracticalAccuracy]

very wise advice.

[@AjackLee4]

If I have a choice I always go 1/7 but if you have a 1/8 or 1/9 it'll probably be fine for most everything. 1/12 and slower is the real issue imo.

[@PracticalAccuracy]

I agree, but my preference is 1/8. thanks for watching.

[@johnadams7402]

Hi Andy...Thank you for your time and effort. These are great videos.

[@PracticalAccuracy]

Glad you like them! More on the way.

[@johnadams7402]

@@PracticalAccuracy looking forward to seeing them.

[@Michigan4Conservative]

I am interested to see your take on the 8.6 BLK, once it comes to market. Faxon is working on a barrel, 1 in 3 twist. (.338 bullet)

[@PracticalAccuracy]

Interesting twist rate. That's a big bullet. Thanks for watching.

[@TheChristonline]

Yeah man , great video , subscribed due to great shooting and great presentation !

[@PracticalAccuracy]

Thanks. Hope it was informative

[@onpsxmember]

I thought 1:7 was more for short barrel variants below 12''. Glad I found your channel. I'll look at some more of your videos.

[@PracticalAccuracy]

Glad it helped. Thanks for watching.

[@svoncampe]

I type this message before watching the video, so forgive me if it is addressed. I'm interested in getting an AR pistol in 300 bo and running subsonic to eventually suppress. The options are 8.5" and 10.5" barrel lengths. Will it matter especially with the shorter barrel what twist rate I chose? Would 1:7 be better for the shorter barrel, or does it even matter especially when we intent its primary use to be short distance for home defense? Thanks.

[@PracticalAccuracy]

Sorry, I don't have any experience with 300 black out. I would assume 1:7 would be your safest bet. Thanks for watching.

[@Mark-w3j6p]

THANK YOU FOR YOUR VIDESD ON TWIST RATES. GOOD INFORMATION. NOT REALLY ALOT DIFFERENCE IN 1.7 TO 1.9 . YOU GUYS DON'T GET RID OF YOUR 1.9 TWIST RATE RIFLES. THEY ARE GREAT RIFLES.

[@raywells2858]

Excellent video!!! Wished there were more videos like this out there!

[@PracticalAccuracy]

Thank you and glad it helped.

[@Ben-sv9op]

Great video now I have a piece of mind my Mp Sport only comes with a one and nine and I wanted it to be an all-around rifle hunting as well I was a little concerned but not anymore . I thought I wouldn’t be able to shoot heavier bullets out of mine

[@PracticalAccuracy]

Thanks for watching. I'm glad it was helpful. It's not a guarantee that your rifle will like heavier bullets, but they should be stabilized. So don't be afraid to experiment.

[@jaybot7813]

I have a rock river upper on one of my AR-15 because I blew up my last PSA upper at the range...I think it's 1/9 twist..no markings on the barrel hopefully I can find the right ammo for it!

[@PracticalAccuracy]

You will. They usually shoot really good. If you are interested. kzbin.info/www/bejne/oKqZoGugr5ZkeNE

[@hotchihuahua1546]

I have a 20” 1-7 twist FN barrel and tried the heavier rounds with different manufactures and found my barrel likes 55 grain . Specifically Hornday .223 55 grain V-MAX with a best 3 shot 5/8” at 100 yards . Every barrel is going to be different . With time and manufacturing lots it may change with this round for my barrel as well . This is not science but a hit and miss ( no pun intended ) with quality control . Personally I think barrel harmonics plays heavily in accuracy and why I will go to a heavier barrel in a .223 Wilde to be able to shoot a verity of ammunition that falls into what is acceptable to me for hunting purposes .

[@PracticalAccuracy]

Good info. Have you tested the 55 grain V-MAX past 100 yards? I would bet that it will keep that accuracy.

[@jamesdelgado6933]

Where can I buy that AR 15 cleaning mat ?

[@PracticalAccuracy]

it's a Tekmat cleaning mat. Can't remember where I got it.

[@donnymac575]

I got a 1 in 7 twist 16inch barrel AR and tried out various high quality ammo through it. It happens to prefer the 69 grain federal premium Sierra matchkings the best. It did slightly worse with the higher grain stuff.

[@PracticalAccuracy]

Yes. you have to test your barrel to see what it likes. Twist rate doesn't necessarily correspond with accuracy.

[@AngryMarine9999]

In for info. I have what I believe to be an old colt m16a1 barrel heavy 1 in 14 twist (the upper and barrel have colt Markings). it keyholes with 62gr green tip but not 55gr at 25yards. Thoughts?

[@PracticalAccuracy]

You are going to be limited to 55 grain or less. 1:14 simply won't stabilize anything above 55. Also, if you shoot in very cold weather, it may not stabilize 55 gr. That is why the Army switched to 1:12 twist because of cold weather problems with 55 grain. The good thing is you have a rare Colt that is worth a hefty price in the collecting market, assuming you have all original parts. If you decide to sell, make sure you have it appraised first so you don't get taken.

[@AngryMarine9999]

@@PracticalAccuracy thanks for the info. I am going to try and rebuild it back to its glory days. Might keep might sell.

[@PracticalAccuracy]

@@AngryMarine9999 Good luck

[@righteousone8454]

Sounds about right honestly. Check out RegularGuyTraining channel, he explains it very well as well, with what grains work best.

[@georgediffee4835]

Wonder why bushmaster in their catalog says 1:9 best for 55 to 72 grain bullets.

[@cwagner4704]

Love your video , and your T-shirt , which Indian do you ride ?

[@PracticalAccuracy]

Sold it.

[@danstamper1475]

Anderson Arms 1:8 twist can i shot .223 55 grain Remington. Found bulk buy. Just concerned. Not looking for over 100 yards. Mainly self defense

[@PracticalAccuracy]

It should stabilize the bullet fine. I don 't know if that ammo will like your gun as every barrel is different , but stability will not be affected. Good luck

[@mrush336]

I new to the AR platform and bought a 16” barrel 1-9 twist. Where should I start with bullet weight?

[@PracticalAccuracy]

what distance do you want to shoot?

[@spicychich1718]

55 grain. 62 grain at the most. Light-slow, heavy-fast. (Grain-twist)

[@muddyhotdog4103]

You'll find between 50-69 grains to be the sweet spot for 1-9 twist, you can go a tad lower or highr but you're risking destabilizing if you go any higher. SS109 62-grain military ball was optimized for 1/9 twist (though 1/7 was chosen for tracer stability), but you can easily go above 62 grains.. Most 69 grain cartridges tend to shoot pretty good outta 1-9, and as shown in the video many will handle can go even heavier. Every cartridge will shoot differently out of each barrel no matter the weight or twist of the barrel. And if you're looking to get your tightest groups then you're going to want to shoot match grade stuff (ie match kings, bthp, ect) as you won't find the best accuracy with surplus fmj like 55 grain m193 or 62 grain green tip/ss109 ; although some barrels can shoot it pretty good.

[@PracticalAccuracy]

@@muddyhotdog4103 I couldn't agree more. Thanks for watching.

[@mrush336]

@@PracticalAccuracy I think my skill level won't let me shoot must past 100 yards.

[@wazhazhe5831]

Interesting video. Thanks.

[@PracticalAccuracy]

Thanks for watching

[@Hellseeker1]

Thank you for your service sir!

[@PracticalAccuracy]

Very welcome. hope it was helpful

[@Shadowdancer777]

Mine is 1/7 twist. Is it better to shoot longer heavier bullets? I heard lighter 55 grain would probably not be accurate due to over stabilization.

[@PracticalAccuracy]

You just have to try it. Your gun may like 55 grain.

[@hartsickdisciple]

I've heard that too, but my 1 in 7 barrel seems to do great with 55 grain. 1 to 1.5 MOA at 200 yards.

[@PracticalAccuracy]

@@hartsickdisciple You gotta test to verify. Good thing you did.

[@darylsnowden5256]

just subscribed, keep up the good work

[@PracticalAccuracy]

Thank you.

[@terrysanture2066]

What about light bullets? 55gr, 40gr maybe?

[@PracticalAccuracy]

Good question. I have not tested anything lighter than 53 gr out of a 1-9 twist or 55 grains out of a 1-8 twist. They were completely stabilized. 1-7 may give you problems below 55 gr with light jacketed bullets. The twist rate is fast enough that some light jacketed bullets may actually come apart mid flight because of the high rpm rate. There are videos showing this. Also, remember that your twist rate doesn't guarantee an accurate gun. You still need to test different bullet weights in your particular rifle. I will hopefully be testing 1-7 twist in the future.

[@johnd4348]

Good video presentation. great for only 3 videos

[@PracticalAccuracy]

Thanks for watching

[@nightsquatchprepper6965]

I have a 16 inch 1/9 twist and ive been shooting 55 grain in it so i can shoot higher grain in it? Sweet thank you soooo much

[@PracticalAccuracy]

Yes. No problem shooting up to 77 grain. How your rifle performs will depend on barrel quality and what grain your barrel likes. Thanks for watching

[@jeremiahjohnson3018]

I see your point in this video. From what I saw, you shot one bullet weight out of 3 different barrels with a 1/9 twist rate. I don't feel that a blanket statement of twist rate does not matter is fair here. If you had shown how 55gr, 62gr and 77 grain shot out of a 1/9 barrel it may be more of a valid argument. I have a rifle with a 1/8 and one with a 1/7. The 1/8 prefers 55gr and will produce 1moa groups. The 1/7 likes 62gr and will produce a 1moa group. If I interchange the bullet weights between these two rifles; the 1/7 with 55gr and 1/8 with 62gr the group sizes open up significantly and approach 3-4moa at 100 yards. If it truly did not matter, there would probably only be one twist rate available for a 5.56 barrel. I am not here to say you are wrong, I think that your video is saying that 1/9 twist can shoot 77gr, not that overall twist rate is irrelevant to the accuracy of any given bullet weight. (Edited for misplaced number)

[@PracticalAccuracy]

What you say is true. However, shooting 2-3 inch groups does not mean your bullet is unstable. It just means that your rifle doesn't like a particular load. What I was trying to demonstrate was that the bullet will not be so unstable as to keyhole. 55 will not keyhole in a 1:7 twist. It may or may not shoot good groups. I should have be a little clearer in the video on this. Thank you.

[@jeremiahjohnson3018]

@@PracticalAccuracy I would agree with you on that. It's not keyholeing, just a larger group.

[@thomasmulnix3301]

The 16” rifle had the best glass on it , I would bet if you switch the glass the title of best rifle will change , you need to be more consistent to do an honest comparison.

[@jmartin9059]

*Thank you for the honest field report. I am not entirely shocked by the results. Black Hills are a fairly good quality ammo with a "fairly warm powder charge"... {usually referred to as 'full power loads'}. I do wonder if the "somewhat valid part of the myth" relates to INFERIOR quality barrels or barrels with poorly cut rifling grooves, improperly cut muzzle faces or barrel crowns &/or "reduced velocity loads" that do exhibit reduced rotations per minute... and, 'lastly', the Pistol / SBR {very short barrels} which also give up some bullet speed and Rotations per minute. Effectually, I 'suspect & speculate' that a 7.5", 8.5" or 10" SHORT barrel firearm with budget grade mystery maker ... loaded with budget grade mystery maker 77 grain {reduced velocity loads} might give different results: such as ... tumble, yaw, key-hole, poor accuracy, etc. Such combinations might be where the myths prove to be true.*

[@PracticalAccuracy]

I would be interested in the SBR results. I don't have any experience with them so i limited my opinion to 16 inch plus barrels.

[@jammbbs1688]

I've got small hands and I still prefer the ergo palm swell grip looks just like yours

[@PracticalAccuracy]

Very good. You don't know what works un til you try it. It's wonderful that we have so many choices.

[@MrTruck1012]

can someone tell me if barrel length makes any difference? I seen him say in an earlier video that a bullet will make the same number of revolutions in a 1/9 20" and a 1/7 16". That has to play into this?

[@PracticalAccuracy]

Barrel length won't matter between 14.5 and larger. Cant comment on shorter barrels

[@jorgesolis9468]

How accurate is the question because with my 16 inch 1:9 I get penny size groups at 100 on a stand with hornady 55 gr frontier fmj while 75 gr bthp frontier from the same gun and everything my groups spread to 4-6 inch groups

[@PracticalAccuracy]

You hit the nail on the head. Every gun is different. Also, with 1:9, if the barrel manufacturer does not cut the rifling accurately, some 1:9 could be closer to 1:10, which will generally not optimally stabilize heavier bullets. You can always measure your rifling to double check the twist. If you don't know how, Midway usa has a short video on youtube showing how it's done. thanks for watching.

[@jorgesolis9468]

@@PracticalAccuracy mine is a true 1:9 since 68 gr stabilize with penny size groups as well winchester extreme point

[@Just_a_guy093]

why AR? does it not apply to bullpups? i have a aug a3m1 1:9 16"

[@Just_a_guy093]

One video I saw said it’s due into how long the projectile is? A shorter 75 grain bullet is capable of stabilizing but when you have the jacketed hollow pointed options that are longer or just the longer ones in general. That is when you see issues?

[@cosasdepuromacho1247]

Great Video , Thanks 🔥👌💪💯🇺🇸

[@PracticalAccuracy]

You're welcome. Hope it helps.

[@Not_Sure_81]

Found your channel and instantly subscribed. But I can't help but wonder why you would give your money to an anti gun company like rock river arms when there are a nearly endless amount of serious pro 2A companies making amazing rifles. To each their own I guess. Regardless, great content 👍Please make more✌️

[@PracticalAccuracy]

Thanks for watching. I understand the Rock River hate. I bought my first in 2008 before I knew anything about the company. I've bought more and I guess I was able to let the negative feelings go as I think (i don't know for sure) the company realized the mistakes they made. If they were still promoting anti 2A legislation, I would not buy from them. But, I certainly understand where you are coming from.

[@ryanrichardson9915]

What about 1:8 twist with the 77 grain? 16" BCM barrel.

[@PracticalAccuracy]

1:8 works fine for me with 77 grain. Here is the video link for me shooting 1000 yards with 1:8 twist Rock River. kzbin.info/www/bejne/qXWXeq2bgc98rKs

[@nono559]

How bout a 55gr out of a 1:7 twist?

[@jamesmaher9124]

Thank you.

[@PracticalAccuracy]

Thanks for watching

[@markb9896]

I shoot the Operator III by Rock River with a 1-8 lpvo and it's a great combo!

[@PracticalAccuracy]

Rock River puts together an accurate rifle

[@garenmoring8403]

I’m building an Ar pistol and I’ve been wanting a 1:8 twist to stabilize everything, can a 1:7 twist stabilize a 55gr bullet well?

[@PracticalAccuracy]

Yes, but every barrel is different so it might not accurately shoot 55 grain or it may love 55 grain, but it will stabilize the bullet. Same is true with 1:8. Hope this helps.

[@garenmoring8403]

Thank you can’t wait for your next video! If you have knowledge about a good gas length combined with different barrel lengths as it pertains to a Ar Pistol‘s and shooting both suppressed and unsuppressed that would be a great video. I’m thinking 12.5 with a mid length would be good dwell time but I don’t know much about that

[@PracticalAccuracy]

@@garenmoring8403 AR pistol is on my list. I don't have one yet, but I'm Looking at 12.5 as well. I will also be looking at a suppressor. Not sure of the gas length, other than I went for a carbine length on my 14.5 build.

[@larrygoldstein3481]

Now what I want to see is a 1:7 twist firing 55g bullets.

[@PracticalAccuracy]

I don't have access to 1:7 right now, but when I get a chance I will. There is a guy named Molon on the ar 15 forums that shoots his 1:7 twist Colt barrel into 1/2 moa groups (10 shots) with handloads.

[@PracticalAccuracy]

@Sky King Awesome.

[@rich1958]

55 gr is most popular and cheapest ammo to buy. I never see 77 gr anywhere and on rare occasion you find it, it’s super expensive. Why are 1/7 twist barrels so popular?

[@PracticalAccuracy]

Before the ammo shortage you could get black hills 77 for about $1.15, which is expensive. However, I would rarely shoot more than 25 rounds in a session. Now, it's super hard to find and prices are over $2 and sometimes as much as $3k so I haven't bought any in over 2 years. I'm glad I stocked up when I did. As far as 1:7, I think it's plain old American marketing. My 1:9 twist barrels from Rock River are tac drivers. Thanks for watching.

[@rich1958]

@@PracticalAccuracy Thanks! If I had to do it over, I would have purchased a 1:8 or 1:9 twist since I also have a 14.5" barrel. But then again, for practical purposes it shoots anything. Sometimes I tend to over complicate things. lol

[@PracticalAccuracy]

@@rich1958 Agreed. I'm trying to keep it simple.

[@NMIBUBBLE]

What was the scope? Brand

[@PracticalAccuracy]

nightforce, SWFA, and a Trijicon Acog

[@cmtwgrdk2748]

I had a 20 inch 1-9 twist,,it could NOT stabilize a hornady 75 grian tipped bullet(very long),,,,it could barely stabilize a 75 grain open tip,, slightly shorter ,,so 77 grain depends on lenght and temperature,

[@PracticalAccuracy]

If you were shooting Amax or ELD-M 75 grain, it won't stabilize. Temperature can make a differencr in certain situations. In this video, kzbin.info/www/bejne/n4jSqKmBeat2mtE I shoot 77 grain in a 1/9 twist with no problems. Also, if you are having problems, you can always measure the twist rate to verify the barrel was cut correctly. Thanks for watching.

[@keithmoore8777]

Does barrel length matter!? Will this apply with a 16in barrel?

[@PracticalAccuracy]

No it wont have a major effect on stability. The best performing rifle in the video was 16 inches. If you are shooting at sea level and/or it's very cold, this could be a factor in stability.

[@keithmoore8777]

@@PracticalAccuracy thank you and I subbed!!

[@PracticalAccuracy]

@@keithmoore8777 thank you. I hope the video helped you. I will have more content soon.

[@johnnybbgunner2136]

Why do we have to call these rifles AR’s? Why not just long rifles used for hunting.? Everyone thinks AR stands for assault rifles.

[@PracticalAccuracy]

I guess we need better education of the history of the abbreviation for Armalite Rifle. Thanks for watching.

[@MrChickennugget360]

because we are talking about Stoner's design. "long rife used for hunting" is not much of a definition.

[@BigTomInTheBasement]

It's now America's Rifle.

[@jamesalexander3547]

Armalite Rifle.. Not our fault the morons can't recognize that.

[@dhurley808]

How does this compare to a 12.5" or your mini recce

[@PracticalAccuracy]

Not sure as I have not personally tested it, but generally barrel length is not a big factor in stability per Brian Litz one of the foremost experts on the topic. Thanks for watching .

[@dhurley808]

@@PracticalAccuracy at any length? I watched the video, I swear. Great info! I have a 1/9 I was considering using for a mk12 mod h. This was the video I needed

[@PracticalAccuracy]

@@dhurley808 I would have to look up the info from Brian on length, but between 20 and 16 is doesn't matter.

[@sergiov8198]

What was the barrel length on third rifle?

[@PracticalAccuracy]

Thank you for watching. The 3rd Rifle in Part 1had a 20 inch barrel with 4 power Acog. 1st Rifle was also 20 inch and second rifle was 16 inch. All 3 had a 1-9 twist.

[@hunterjager9538]

Ok here me out... if twist was dependent on bullet length then why does they very long m855a1 shoot better in a 1n9 then a 1n7.

[@TerminalM193]

"Better" is completely dependent on the barrel design, twist rate and material & process used to construct the barrel. The point of the video is primarily put to rest the myth of stabilization between the three most common twist rates. All will stabilize perfectly fine but when it comes to accuracy there's far more variables that take priority above twist rate.

[@davefranks6562]

nice shot at such a far distance!

[@PracticalAccuracy]

thanks

[@MTMILITIAMAN7.62]

I cut rifling for Proof Research, and to say rifle twist rate doesn't matter is simply wrong. Just because the bullet is stabilized enough not to keyhole does not mean it is optimally stabilized. The bullet may still be rotating around its longitudinal axis so that the tip makes small circles around its vector in flight. This will not result in the best ballistic coefficient. You may get adequate accuracy, even at extended range, but you won't get the best external ballistics, and probably won't get the best accuracy either. It is much easier to under stabilize a bullet than over stabilize a bullet, so the average shooter is probably better off with the faster twists, because it gives them more options. There is a reason long range shooters typically go with fast twist barrels shooting heavy for caliber VLDs. A fast twist gives enough rotational velocity to optimally stabilize longer bullets in more conditions. The military went with the 1:7 twist because the 5.56 M856 tracer round required it to be stabilized in arctic conditions, as cold air is denser than warm air, and therefore requires more rotational velocity to stabilize a projectile. The fact is that no serious fighting rifle in 5.56 has a 1:9 twist. All fighting rifles in 5.56 have twist rates of 1:8 or faster because these twist rates allow for greater flexibility, and provide optimal stabilization for longer projectiles in a wider range of environments. Rifles in .224 cal with 1:9 or slower twists are range toys and varmint rifles.

[@PracticalAccuracy]

I agree with some of what you said, but not your conclusions. What I know is that all three 1:9 rifles I shot out to 567 yards were plenty accurate and this could not have been achieved without adequate bullet stability. I shot 3 different rifles to prove I didn't have a one off rifle fluke. I have another A2 rifle 1:9 twist that I shoot (75 gr.) out to 800 yards very accurately, hitting full size IDPA targets. With 4 rifles, the proof is in the pudding. Plus, 99% of civilian shooters won't be shooting in Artic conditions (which I agree can affect bullet stability) or using Military tracers. Also, serious long range competitors may need faster twist rates because they are shooting 80 grain plus VLD's that they cannot magazine feed, but single load into the chamber. I'm not talking about twist rates for them, which I agree may require faster twist rates. I understand that not this does not guarantee that every 1:9 twist will accurately shoot 77 grain bullets, just as a 1:7 cannot guarantee accurate shooting with 77 grain bullets. However, most good quality 1:9 twist barrels with provide enough stability for accurate shooting at distance given the parameters set forth in the video. Thank you for watching, but I respectfully disagree.

[@MTMILITIAMAN7.62]

@@PracticalAccuracy Just because the 1:9 provides adequate results doesn't mean it provides optimal results. You proved that the 1:9 was adequate, but you didn't show that it was equal to or better than a faster twist rifle. You can't escape the fact both ammunition manufactures recommend 1:9 or faster. The 77 gr Sierra Matchking was designed for competition shooting in AR pattern rifles because it will fit inside magazines without the need to single feed. Every single military weapon that has used this bullet, from the old iron sighted M16A2s at Camp Perry to the PRI Mk 12 Mod 0 that the Mk 262 was developed for has a 1:7 twist. The proof is in the pudding, but it doesn't say what you think it says. You proved that the 1:9 might be good enough, not that it was the best, or just as good as other options. The proof in the pudding is that professional end users choose faster twists for those bullets. The proof in the pudding is that 90% of the .224 cal barrels I cut rifling in at Proof Research have a faster twist rate than 1:9. The proof in the pudding is that the entire industry has realized twist rate absolutely matters and that faster twists give you more options.

[@PracticalAccuracy]

@@MTMILITIAMAN7.62 I can see there is some misunderstanding about what my video is about. I must not have adequately explained what I was trying to prove and the intended audience. This video was meant for beginning shooters who are told 1. a 1:9 twist barrel cannot stabilize 77 grain bullets and 2. a 1:7 twist barrel cannot stabilize 55 grain bullets. Both of these statements are false. This video was not meant to prove 1:9 twist barrels are better than 1:7 or 1:8. I have no bias either way for any of the barrels. If 1:7 or 1:8 works for someone, more power to them. I in fact shoot several 1:8 twist rifles in other videos. A 1:8 A2 with iron sights at 1000 yards with good results and a 1:8 A4 with 16 power scope at 1000 yards with good results. This video simply shows that a 1:9 twist will stabilize 77 grain bullets at distances most shooters will never even attempt to shoot. Hitting a 12 inch steel plate 9/10 times with 2 different rifles shows this. I also know I can do it out to 800 yards(IDPA 18x30), I just don't' have it on video. Additionally, the boxes I read from said "1:9 twist or faster" not 1:8 twist or faster. With regard to 1:7 twist, I still need to get my hands on a rifle and I know it will show a 1:7 will stabilize 55 grain bullets. If you follow the ar-15 forums, you will see a guy named "Molon" who can shoot a 1/2 inch groups at 100 yards using 55 grain hand loads and a Colt 1:7 twist barrel. I hope this clarifies what I was trying to show.

[@MTMILITIAMAN7.62]

@@PracticalAccuracy Okay, fine. But telling beginning shooters that twist rate doesn't matter is disingenuous. Twist rate does matter. Telling people that twist rate doesn't matter, in the title to your video, insinuates that 1:9 is just as good. It isn't. It is like when your vehicle's operator manual says to use at least 89 octane fuel, so you show your vehicle still drives with 89 octane fuel and then pronounce octane levels don't matter. Using the minimum recommended standard for anything and then pronouncing standards don't matter is dishonest and wrong.

[@PracticalAccuracy]

@@MTMILITIAMAN7.62 I guess we disagree. I don't think it matters between 55 and 77 grains. The viewers can judge whether hitting 12 inch steel at 567 yards 9/10 shots is good enough with a 1:9 twist.

[@chrish1585]

Interesting that you do not list any qualifications or experience related to this topic. Factual experience on a range at multiple distances and with multiple bullet weights and barrel twist. Fact, a 1/9 barrel will NOT stabilize a 77grain bullet beyond 400 yards. Factual practical testing at Damneck on the rifle range 100 to 500 yards 2008. 3 DPMS match AR15s with 3 different twist rates. Out to 300 yards there is little difference. 400 to 500 performance drops significantly in heavier "longer" bullets in lower twist rate barrels. Past 500 yards, a 77grain bullet from a 1/9 twist barrel may as well be a shotgun. The accuracy loss is significant due to destabilizing of the bullets.

[@PracticalAccuracy]

1/9 will stabilize 77 grain Bullets past 500 yards. In part 2 of this Video, I shoot out to 567 yards. I also changed the weather conditions to very cold temperatures and shoot out to 567 yards with 77 grain bullets in this video. kzbin.info/www/bejne/n4jSqKmBeat2mtE Moreover, I have shot out to 1000 yards with 2 different 1/9 twist rifles and 77 grain bullets. Those videos will be coming out soon. Every rifle is different, but 1/9 twist will stabilize 77 grain bullets.

[@TerminalM193]

You need to go watch part 2 & 3. Your statements are false given the parameters used within the series. Also, this is purely through my own experience but I have a backyard range out to 533 yards at its furthest point. I have multiple uppers from bcm, SOLGW, Aero, psa, ruger, s&w just to name a few from 1:12 to 1:7 twist rate. At 500 yards I get minimal grouping differences between the 3 most common twist rate barrels when using 55g to 77g cartridges. I certainly get point of impact shifts between the three choices, some of which are up to 10 - 12moa difference BUT all groups are still within 0.2 - 0.5moa from each other. This is of course with the rifle being mounted to a lead sled and using an optic that's ffp with adjustable parallax to keep the closest repeatability possible between all the different uppers. I can't speak for anything past 500 yards but the only time I've ever seen a round keyhole was with my 20" 1:12 twist using 70g+ ammunition.

[@brianleabo6295]

What about the 1/5 and 1/10 thats just 16”

[@BarbosaUral]

There is no real "standard" barrel length. But the most common length is 16". You say the first rifle is a 20:, but you don't mention the length is the other two.

[@PracticalAccuracy]

Thanks for watching. You are correct. 2-20 inch and 1 -16 inch. Was one of my first videos and I'm trying to get better.

[@BarbosaUral]

@@PracticalAccuracy Hey, not a problem. You're doing fine. But I had to ask. BTW, I subscribed.

[@PracticalAccuracy]

@@BarbosaUral Thanks.

[@raymondj8768]

My AR 15 HAS THE 1/8 SO IM RITE IN THE MIDDLE N I SHOOT THE GREEN TIPS WORKS GREAT ,

[@PracticalAccuracy]

Awesome. Thanks for watching.

[@MrZombieslayer409]

How far off are the 55 gr impacting if your sighted in with 62 gr

[@CharlieCheapshot]

at 100 yds no but at 300+ it absolutely matters and using anything less than 69g and 1:7 is just silly

[@PracticalAccuracy]

I disagree. I regularly shoot 1:9 twist out to 567 yards and can generally hold 1 moa accuracy at that distance. Here is my latest updated video showing this. kzbin.info/www/bejne/n4jSqKmBeat2mtE Thanks for watching.

[@thecheapshot1065]

You're doing great for the short time that you've been at this. I've been doing it longer more videos and you have a much bigger subscriber base. TheCheapShot here's my KZbin channel and I've got a couple of successful videos not a lot of subscribers. I'm switching my format though to much more educational as those seem to get the most views

[@PracticalAccuracy]

I think education will get you more traction. My better videos focus on education than the videos of me just shooting at the range.

[@stevenmarcus2709]

Not a hard decision, 1/7” all day.

[@PracticalAccuracy]

Thanks for watching.

[@mrm8556]

🌹🌷👍

[@PracticalAccuracy]

Thank you

[@richvest7212]

I agree ,it doesnt matter

[@randelldarky3920]

I am not shooting roaches at 238 meters.

[@J-Burgerz]

Not a hard decision. 1:8 all day

[@PracticalAccuracy]

No argument from me on that one.

[@noone3189]

Bingo! :)

[@ulflyng]

Link....

[@americangamer7661]

Bomb threat is a terroristic threat. You should have gotten the FBI involved

[@SolidBold00]

Sorry but I don’t see how using 1/9 twist to prove 1/7 twist results proves anything or makes any sense. I believe that it doesn’t make a huge difference but just seems pointless for a video to talk about it yet not show it

[@PracticalAccuracy]

follow up video here: kzbin.info/www/bejne/pnuYnZprYpWhg5o

[@blackfam972]

First off the AR15 is a platform not a caliber so twist rates will be different with different calibers. The fact you don't seem to know this means that we should not listen to jack you have to say. Start over and talk about the twist rates of 5.56 NATO which is what you really mean.

[@PracticalAccuracy]

Craig, you are correct that the Ar-15 has evolved into a platform and is not a single caliber/chambering and twist rates will differ. I am also aware of this and thought it was evident from the video that I was only talking about 5.56mm/.223 caliber. I will make a notation in the title or description to note that fact. However, the twist rates that I discuss are applicable to 5.56 Nato, .223 Wylde, and .223 rem chambered rifles. I have shot 5.56mm Nato (77 gr.) ammo and .223 Rem ammo (75 gr. hornady) out of both 5.56 Nato chambered and .223 Wylde chambered rifles (1:9 twist) accurately out to 800 yards. 566 yards in video part 2. I hope to get out to 800 yards when the weather warms. So the point of the video was to show that this can be done accurately with a 1:9 twist rate and 77 gr. 5.56mm/.223 ammo The video was not meant to be a comprehensive discussion of all calibers or twist rates in the Ar-15 platform. Sorry for the confusion.

[@yjoeyyy]

The guy just trying to make a good video explaining some basic information maybe a entry-level basis. I’ve met this guy once at the range he actually seems like a pretty decent guy maybe cut them a break I got a lot out of the video. I guess I just thought the A.R. 15 is just normally caliber any 556 round didn’t really think much about it even though I know that they make in other calibers.

[@TargetSuite]

@Craig Black The title of the video makes it clear this is about 5.56 nato/.223 Rem.

[@blackfam972]

@@TargetSuite the title has now been changed so yes it now does but not when I made my comment

[@raymondj8768]

@@yjoeyyy i agree !

[@rickyosborn828]

You're wrong the most boring thing is sitting there watching you talk shooting a rifle is what this is all about or should be

[@defrespnow]

Lol what!?

[@americangamer7661]

You overpaid like $400 for your 2nd rifle.. then you put really nice $1600 scope on a $450 rifle 😆😆😆😂😂😅

[@Caderic]

Don't be that guy! There are plenty out there that want to take your guns!!!

[@TheEverLovingOutdoors]

Maybe try sticking to the topic... the uhh's and this and that got too annoying for me...

[@PracticalAccuracy]

Thanks for the feedback.

[@compasslife6658]

Don't be a douche. The content is excellent. Start your own channel and let us comment. 👍

[@jamesalexander3547]

@@compasslife6658 some people are just a$$holes man.

[@joemarchinski914]

hahaha, when I saw thia video there were 223 comments...guess I am 224

[@PracticalAccuracy]

Keep commenting and maybe you will be comment 556. lol Thanks for watching and commenting.