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AR 15 Barrel Twist Rate
#5670215
03/26/15 03:56 PM
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Joined: Apr 2010
Posts: 144
jeff2003
OP
Woodsman
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OP
Woodsman
Joined: Apr 2010
Posts: 144 |
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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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670255
03/26/15 04:20 PM
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Joined: Apr 2010
Posts: 4,991
Varget 7-08
Extreme Tracker
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Extreme Tracker
Joined: Apr 2010
Posts: 4,991 |
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670262
03/26/15 04:23 PM
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Joined: Sep 2009
Posts: 18,988
ChadTRG42
THF Celebrity
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THF Celebrity
Joined: Sep 2009
Posts: 18,988 |
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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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670276
03/26/15 04:30 PM
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Joined: Dec 2008
Posts: 22,630
Cast
THF Celebrity
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THF Celebrity
Joined: Dec 2008
Posts: 22,630 |
"Over stabilize" a bullet? Is that a real thing?
Kinda like over saturated ground...
Cast I have a short attention spa
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670371
03/26/15 05:15 PM
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Joined: Apr 2010
Posts: 144
jeff2003
OP
Woodsman
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OP
Woodsman
Joined: Apr 2010
Posts: 144 |
Thanks! Any recommendations on a good complete upper with 1:8 twist?
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670432
03/26/15 05:41 PM
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Joined: Nov 2009
Posts: 915
hdfireman
Tracker
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Tracker
Joined: Nov 2009
Posts: 915 |
What length barrel you looking for?
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670434
03/26/15 05:42 PM
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Joined: Apr 2010
Posts: 144
jeff2003
OP
Woodsman
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OP
Woodsman
Joined: Apr 2010
Posts: 144 |
16+ would prefer a 16 with a mid-length system.
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670451
03/26/15 05:51 PM
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Joined: Apr 2010
Posts: 825
Spent Brass
Tracker
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Tracker
Joined: Apr 2010
Posts: 825 |
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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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670481
03/26/15 06:12 PM
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Joined: Nov 2009
Posts: 915
hdfireman
Tracker
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Tracker
Joined: Nov 2009
Posts: 915 |
16+ would prefer a 16 with a mid-length system. OK. All I have is fluted 18" with mid length
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5670899
03/26/15 10:16 PM
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Joined: Sep 2007
Posts: 5,029
TexasEd
THF Trophy Hunter
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THF Trophy Hunter
Joined: Sep 2007
Posts: 5,029 |
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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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5672227
03/27/15 04:47 PM
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Joined: Apr 2013
Posts: 2,424
tenyearsgone
Veteran Tracker
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Veteran Tracker
Joined: Apr 2013
Posts: 2,424 |
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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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5672247
03/27/15 05:00 PM
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Joined: Nov 2009
Posts: 915
hdfireman
Tracker
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Tracker
Joined: Nov 2009
Posts: 915 |
AR Performance or White Oak.
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Re: AR 15 Barrel Twist Rate
[Re: jeff2003]
#5672586
03/27/15 09:23 PM
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Joined: Nov 2011
Posts: 422
BWH_65
Bird Dog
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Bird Dog
Joined: Nov 2011
Posts: 422 |
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
Last edited by BWH_65; 03/27/15 09:25 PM.
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