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#5670215 - 03/26/15 10:56 AM AR 15 Barrel Twist Rate
jeff2003 Offline
Woodsman

Registered: 04/15/10
Posts: 144
Loc: Abilene, TX
1:7 or 1:9. I'm not looking to use the gun for competitive shooting. I know the 1:7 is mil-spec, but that's because the military uses the heavier M855 and the other armor piercing rounds. Will 1:7 over stabilize 55 gr bullets and hurt accuracy? I'm looking at the PSA uppers, but they all seem to be 1:7.

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#5670255 - 03/26/15 11:20 AM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
Varget 7-08 Offline
Extreme Tracker

Registered: 04/04/10
Posts: 4968
Loc: SA / Helotes, TX
1:7 55-77

1:9 50-69ish

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#5670262 - 03/26/15 11:23 AM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
ChadTRG42 Offline
THF Trophy Hunter

Registered: 09/16/09
Posts: 9396
Loc: Lewisville, TX
I'd go 1:8". The 8" twist will stabilize the heavy bullets, as well as shoot the lighter one's well. Plus, there is a big difference in the accuracy on certain rounds when you go to the 1:9". The 8" has a more universal twist. The 9" can be finicky on what loads it likes.
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www.DallasReloads.com
Type 01 and Type 06 FFL

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#5670276 - 03/26/15 11:30 AM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
Cast Offline
THF Celebrity

Registered: 12/14/08
Posts: 14901
Loc: North Texas - God's Country
"Over stabilize" a bullet? Is that a real thing?

Kinda like over saturated ground...
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Cast



I have a short attention spa

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#5670371 - 03/26/15 12:15 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
jeff2003 Offline
Woodsman

Registered: 04/15/10
Posts: 144
Loc: Abilene, TX
Thanks! Any recommendations on a good complete upper with 1:8 twist?

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#5670432 - 03/26/15 12:41 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
hdfireman Offline
Tracker

Registered: 11/29/09
Posts: 719
Loc: Flower Mound
What length barrel you looking for?
_________________________

eric@blackstonearms.com
214-945-5520
The 6.8 is the #1 choice for hunting deer and hogs in an AR15

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#5670434 - 03/26/15 12:42 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
jeff2003 Offline
Woodsman

Registered: 04/15/10
Posts: 144
Loc: Abilene, TX
16+ would prefer a 16 with a mid-length system.

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#5670451 - 03/26/15 12:51 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
Spent Brass Offline
Tracker

Registered: 04/22/10
Posts: 816
Loc: Longview, TX
I have the 1:9 PSA mid length upper with the stainless barrel. It puts 5 shots you can cover with a quarter at 50yds shooting Wolf 55gr FMJ.

1:8 will give you more wiggle room with different bullet weights though.

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#5670481 - 03/26/15 01:12 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
hdfireman Offline
Tracker

Registered: 11/29/09
Posts: 719
Loc: Flower Mound
Originally Posted By: jeff2003
16+ would prefer a 16 with a mid-length system.


OK. All I have is fluted 18" with mid length
_________________________

eric@blackstonearms.com
214-945-5520
The 6.8 is the #1 choice for hunting deer and hogs in an AR15

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#5670899 - 03/26/15 05:16 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
TexasEd Offline
THF Trophy Hunter

Registered: 09/27/07
Posts: 5000
Loc: Cedar Park, Texas
Originally Posted By: jeff2003
16+ would prefer a 16 with a mid-length system.


I bought a thin profile, stainless, 16" barrel with mid-length gas and 1:7 twist from PSA a while back and shot this using cheap Academy .223 55gr ammo at 50 yards with a 2 MOA dot.



here is the upper on the rifle, I got it for $350 on Black Friday sale. Awesome deal.

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#5672227 - 03/27/15 11:47 AM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
tenyearsgone Offline
Pro Tracker

Registered: 04/21/13
Posts: 1213
Originally Posted By: jeff2003
Thanks! Any recommendations on a good complete upper with 1:8 twist?


I'm using a Rainier Select series medium contour barrel on one of my AR's and can get <.5 moa with a several different hand loads. See if you can find an upper with one. I know Rainer sells them on their website. White Oak Armament makes a good barrel too.

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#5672247 - 03/27/15 12:00 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
hdfireman Offline
Tracker

Registered: 11/29/09
Posts: 719
Loc: Flower Mound
AR Performance or White Oak.
_________________________

eric@blackstonearms.com
214-945-5520
The 6.8 is the #1 choice for hunting deer and hogs in an AR15

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#5672586 - 03/27/15 04:23 PM Re: AR 15 Barrel Twist Rate [Re: jeff2003]
BWH_65 Offline
Bird Dog

Registered: 11/17/11
Posts: 399
Loc: Texas, Palo Pinto
Rock river predator pursuit upper has a 1:8 twist. Mine shoots .5 moa with my 55gr handloads. Plan to load up some other grain bullets soon but just haven't had time.

Got mine from joeboboutfitters.com


Edited by BWH_65 (03/27/15 04:25 PM)

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