Tech Tip: AR-15 Twist Rates

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Күн бұрын

In this Tech Tip Brownells gun tech Steve Ostrem explains AR-15 twist rates, ideal bullet weights, and their applications. Learn more here www.brownellsvideos.com

Пікірлер: 40

@5jjt 2 жыл бұрын

Overwhelmingly, 5.56/.223 is sold in 55 & 62 grain, so why are most barrels sold in 1:7 twist rate?

@scrapparts7698 2 жыл бұрын

Good question, i wonder the same

@vanmann8347 2 жыл бұрын

Absolutely the quickest and most thorough explanation. Not drawn out a boring.👍

@LUR1FAX 2 жыл бұрын

Seems that 1 in 8 twist is pretty optimal for shooting 55 grain to 75 grain bullets. 1 in 7 tends to be overkill for 55 grains. I've seen good results with 1 in 9 inch twist too for a variety of projectile length.

@jimdees4758 6 жыл бұрын

Short and right to the point. Thank you I have learned a lot today.

@notsure8800 2 жыл бұрын

16” 1:7 twist is perfect

@s.thompson9 3 жыл бұрын

How are twist rate and barrel length related? Do you need a faster twist for a shorter barrel and slower twist for a longer one ?

@jduffey320 2 жыл бұрын

Great video. I love Brownells

@JohnDoe-eo8ux 2 жыл бұрын

Can you guys do this video but for the AR-10??? I’d like to see the same chart for .308 and possibly 6.5 creedmoor

@pauldy1239 3 жыл бұрын

does shooting boattail ammo change the optimum twist rate?

@s.thompson9 3 жыл бұрын

Can you please do this video but for AR 10s

@LKaramazov Жыл бұрын

And yet 1:7 is the most popular even thought he most popular bullet I’m thinking is 55 grain.

@EquipaPatriot Жыл бұрын

Ugh! I'm still confused. I believed that 1/8" twist rate was the do all twist rate, so I bought a 14.5" barrel with that rate to be used with my defensive AR-15. I believed this twist rate would match well with the M193 bullets I've stockpiled. I hope I'm not wrong.

@khester7397 Жыл бұрын

Your 1/8 twist should do just fine with those. 55 grains is on the small end of whats optimal for that twist, but the 1 in 8 is considered the best all around twist for ARs by many.

@FreeBayArea Жыл бұрын

Does barrel lenght play any part?

@Tman646482 3 жыл бұрын

77 is the biggest that will fit into a magazine so this is still misleading information. The 1-9 is able to shoot the 77 grain. That is why we chose these years back because of it being accurate with all ammo grains. The AR twist chart isn’t needs adjustments in my opinion. . 1-12 twist is a rare twist rate in my opinion too. Maybe in the longer gas systems?

@seethebutter 2 жыл бұрын

Thank you

@willypp13 4 ай бұрын

Nice explanation

@elguero7385 2 жыл бұрын

So if I want to use a conversation kit for .22 lr higher twist rate barrels are better when hunting rabbits

@corpsie666 9 жыл бұрын

The point about SS109, even though it's 62 gr, being different than steel-free 62 gr seems to be something that is neglected in twist rate discussions in messageboards.

@DonziGT230 8 жыл бұрын

Along with other bullets like lead free, people get stuck on the weight of the bullet when the main issue is actually the length.

@305dade8a 5 жыл бұрын

Yup..all I want of to shoot. Is 55g 223 . so 1in8?

@travish4045 5 жыл бұрын

@@305dade8a 1 in 9

@righteousone8454 3 жыл бұрын

Linus Tech Tips Brownell Tech Tips Both interesting, but very different

@Caderic 3 жыл бұрын

Alex Pierce SCUBA Tech Tips.

@josephsagotti8786 2 ай бұрын

Brownells!

@markchambers8641 4 жыл бұрын

With the 3 different twist rates, 1:7-1:8-1:9 is there a chart to show the difference in the actual barrel hole size??

@righteousone8454 3 жыл бұрын

As far as I understand the twist rate does not affect barrel size. As bigger twist rate would have smaller groove twists, resulting in quicker bullet spin. Inner barrel should remain same size. Correct me if I am wrong.

@markchambers8641 3 жыл бұрын

@@righteousone8454 sounds correct.

@jean-paultheron8415 2 жыл бұрын

Thanks

@chrisbohanon403 2 жыл бұрын

Seems to me you just get a certain grain stick to it zero your rifle to it and everything will be fine I've never fired anything except for a 55 grain and it's always panned out excellent.

@user-cg9nr5rq9u 4 жыл бұрын

Всё равно хлипчеватей Калашмата выглядит, хотя качество зайбатое.

@Blueknight1960 7 жыл бұрын

Does barrel length make a difference when it comes to twist?

@JustinianPrvni 6 жыл бұрын

Very short barrels can have trouble fully stabilizing bullets unless you increase the twist rate. Maybe you remember the case when people built AKS-74u clones by cutting AK-74 barrels down from 16" to 8" (roughly), only to find the rifles were keyholing. Russians prevented this by increasing the 74u barrel twist rate by 20% as opposed to the full length 74, to compensate for the shorter length available to impart rotation on the projectile.

@Tman646482 3 жыл бұрын

Yes