Aero Precision Ar-10 .308 cal. barrel with 22 inch or 24 inch long with 1:10 or 1:8 twist

[Roy Allain]

My first post:

Is it possible to get a 22- or 24-inch barrel in either 1:10 twist or 1:8 twist, preferable the latter? I’ve been looking all over and no luck.

I am a new member from the New Orleans Loserana area so please forgive any mistakes I may make in the future.

Many thanks,

Roy Allain

 

[Catgunguy]

Welcome, this is one place to check.
https://www.fulton-armory.com/far-308-barrels.aspx

 

[rsmithsr50]

krieger
and others...search bbl makers not ar10 parts
1/10 no use for a 1/8
you have started at the bottom, everything is better going up
look at psa

 

[Rocketvapor]

Hello Roy, a fellow bottom feeder from the North Shore.
I went with X-caliber for my mouse gun barrel but wait for the SALE
Then wait for the barrel.
If you buy off the shelf check it for rust.

Listen to the experts. They'll have you shooting tiny little groups.

 

[mac86951]

My first post:

Is it possible to get a 22- or 24-inch barrel in either 1:10 twist or 1:8 twist, preferable the latter? I’ve been looking all over and no luck.

I am a new member from the New Orleans Loserana area so please forgive any mistakes I may make in the future.

Many thanks,

Roy Allain

Hello Roy; many questions I have for you; but I'll start with this one: what platform are you looking for a barrel for? Aramlite ar-10 is not knights SR-25/DPMS-Lr-308.

We'd love for the "10" platform to be as interchangeable as the mouse gunner's tools but they're not.

I'm guessing the LR platform based on your posted Aero Precision Barrel search.

-Mac

 

[rsmithsr50]

buy a ss bbl..not a steel bbl

 

[D-4297]

My vote is for the 1 - 10 twist , 24" length . You might be over-spinning most of the .308 bullets with a 1 - 8 . A 1 - 8 works for a .223 or 5.56 due to the smaller diameter , lighter bullets .

 

[Rocketvapor]

What bullets you gonna shoot?
150-168gr, or 200gr+
What velocity are you going to shoot for, what rpm?
BR, F-Class, going for the mile?

My little 22N shooting 88's @ 2920 is spinning them a little over 300,000rpm with a twist that is 1 in .583 feet.

 

[dcali]

An 8 twist is way overkill in an AR10. I'm surprised if they even make one.

 

[Roy Allain]

My vote is for the 1 - 10 twist , 24" length . You might be over-spinning most of the .308 bullets with a 1 - 8 . A 1 - 8 works for a .223 or 5.56 due to the smaller diameter , lighter bullets .

Hi D-4297: I'm going to go for the 1:10 as that seems to be the consensus.

However, where can I get a 22 inch or 24 inch? Don't say Shilen or Kreiger or Bartlein as they are too expensive.

 

[D-4297]

I can only go back on the old "saw" that you get what you pay for . A "cheaper" barrel will , in my seventy years of experience .
Not last as long
Lose it's accuracy quicker
Was taught a long time ago , you buy quality ONCE . And it lasts . Sorry if you don't like my answer , but you ask . The brand isn't relative , but the quality is . And quality rifle barrels are not a dime a dozen . By comparison ; Have you priced the higher end , quality scopes and compared them to the low end glass ? You get what you pay for in both areas . Not the answer you may have wanted to hear , but that's the reality of it .

 

[rsmithsr50]

save your money toll you can afford a real bbl
why play at the real thing.
try this
https://www.rainierarms.com/rainier-arms-match-308-rifle-gas-sdm-barrel-22/

Hi D-4297: I'm going to go for the 1:10 as that seems to be the consensus.

However, where can I get a 22 inch or 24 inch? Don't say Shilen or Kreiger or Bartlein as they are too expensive.

 

[USMCDOC]

My vote is for the 1 - 10 twist , 24" length . You might be over-spinning most of the .308 bullets with a 1 - 8 . A 1 - 8 works for a .223 or 5.56 due to the smaller diameter , lighter bullets .

it's about length.. not the weight that dictates a twist rate! Unless i am missing something new..

 

[Pawnee Bill]

Call the folks at Compass Lake Engineering. They can fix you up with a Krieger barrel. Nice folks to deal with. Yall come back now, heah.

 

[D-4297]

Without trying to start a debate on ballistics , and if I understood Brian Litz's writings correctly . And my Mech Eng. Profs correctly , the weight of a object being spherically rotated is to be proportional to the amount of rotations , over a given distance . That's why mfgs. make so many different weight bullets in the same caliber . Shooting a 200.20x out of a 1-8 twist .308 barrel , the results would , generally speaking , be less than positive . To say the least . The length of a barrel is only one segment of the equation , for optimum performance .

 

[FilippoMo]

The 1-8" only makes sense if you plan to shoot 250 grs. and/or subsonic.
Filippo

 

[DirtySteve]

Without trying to start a debate on ballistics , and if I understood Brian Litz's writings correctly . And my Mech Eng. Profs correctly , the weight of a object being spherically rotated is to be proportional to the amount of rotations , over a given distance . That's why mfgs. make so many different weight bullets in the same caliber . Shooting a 200.20x out of a 1-8 twist .308 barrel , the results would , generally speaking , be less than positive . To say the least . The length of a barrel is only one segment of the equation , for optimum performance .

Not trying to argue or any thing just a polite debate. But Velocity is also past of the equation. If using a gas gun, the velocity/pressure can not reach the same as a bolt gun. So I would think more twist would be needed to make the projectile stable. Over stabilization is seldom a problem unless there is a defect in the bullet. Then more rotation would result in the projectile fling to a greater degree off the bores axis..


Your thoughts?

 

[rsmithsr50]

yes but with a decent bbl, it just aint so.
common bullet weights(lengths) common twists.
real life applications, not theory.
the energy lost is minimal and often after the bullet has left the bbl.

Not trying to argue or any thing just a polite debate. But Velocity is also past of the equation. If using a gas gun, the velocity/pressure can not reach the same as a bolt gun. So I would think more twist would be needed to make the projectile stable. Over stabilization is seldom a problem unless there is a defect in the bullet. Then more rotation would result in the projectile fling to a greater degree off the bores axis..


Your thoughts?

 

[D-4297]

Some basic physics apply in this discussion . The OP is asking about a AR-10 . A .308 caliber . Pretty well accepted that for most applications , a 1-10 twist barrel is more than sufficient for the majority of bullets used in a .308 , for the majority of comp uses . The reality is that a 1-9 1/2 is actually a better twist rate , but creates other issues . One being cost of mfg. since it isn't a twist rate in common usage . A example is the Finns made their version of the Mosin - Nagant in both a 1-9 and 1-91/2 .308 twist rates , and they are still considered to be one of the most accurate military rifles ever produced . And most highly prized by M-N aficionados . But when have you heard of anyone making a 1-8 twist rate . 308 barrel for any application ? It boils down to diminishing returns . As has been learned by both shooters , and manufacturers decades ago . 1-8 twist rate barrels were designed to keep smaller diameter , lighter bullets stable for longer distances . Physics haven't changed since the AR was created and you have to ask yourself why Gene Stoner created a near perfect combat weapon in .308 to start with ? And the bean-counters , and politicians , and special interests turned it into a "High-powdered" B.B. gun . Think the "KEY" word in the last sentence was "Special interests" . But what do I know ? I'm just a two-tour Nam Vet that can tell you more about that POS than you want to know . Sorry ! Rant over .

 

[DOGCAPPER]

D-4297---Thank you for your service. Hope you came out OK. I don't think the US will ever have an invasion...... The special interest and self centered politicians will sign the country over for Special Consideration For Life for themselves and Hell On Wheels for the remainder of the country.