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AR10 barrel length
#6203570
02/29/16 02:55 PM
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Joined: Aug 2009
Posts: 22,716
BigPig
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Going to be buying or building an AR10, going with the 308, but not sure what barrel length. I would like to keep ammo the same between the 308 bolt gun and this one. The bolt gun has a 24 inch barrel and loves 168 SMK and doesn't really care for anything lighter. Thinking of either an 18 or 20 inch barrel with muzzle break. Will the 18 shoot the 168's ok?
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Re: AR10 barrel length
[Re: BigPig]
#6203581
02/29/16 02:59 PM
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Joined: Nov 2012
Posts: 15,639
QuitShootinYoungBucks
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Barrel length won't really matter, the twist rate is what will matter, and whether or not the AR10 happens to like that same load. I assume the bolt gun is 1:10 twist?
https://web.archive.org/web/20170223065011/http:/www.rrdvegas.com/silencer-cleaning.html
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Re: AR10 barrel length
[Re: BigPig]
#6203601
02/29/16 03:14 PM
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Joined: Jan 2007
Posts: 26,184
KRoyal
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My 16" 1:10 liked Chad's 168 Amax. Shot very well.
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Re: AR10 barrel length
[Re: QuitShootinYoungBucks]
#6203628
02/29/16 03:30 PM
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Joined: Dec 2008
Posts: 41,163
J.G.
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Barrel length won't really matter, the twist rate is what will matter, and whether or not the AR10 happens to like that same load. I assume the bolt gun is 1:10 twist? This
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Re: AR10 barrel length
[Re: KRoyal]
#6203633
02/29/16 03:32 PM
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Joined: Aug 2009
Posts: 22,716
BigPig
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Barrel length won't really matter, the twist rate is what will matter, and whether or not the AR10 happens to like that same load. I assume the bolt gun is 1:10 twist? Yes. Wasn't sure if barrel length and twist rate played a factor. Like if a 16 inch 1:8 wouldn't stable a 168 like a 24 inch 1:8 would. Prob going to run the 18 inch barrel than. My 16" 1:10 liked Chad's 168 Amax. Shot very well. Good to know. Prob going to hit him up for some of that to see if they both like it. I hate to say it, and it's no fault of Chad, but his bulk 168 that I got a year ago doesn't like my bolt gun.
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Re: AR10 barrel length
[Re: BigPig]
#6203766
02/29/16 04:56 PM
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Joined: Dec 2008
Posts: 41,163
J.G.
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I want to see a 1:8 twist .30 cal.
The shorter barrel makes less velocity, that's all.
Look how short a .45 ACP pistol barrel is, and it stabilizes a 230 gr.
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Re: AR10 barrel length
[Re: BigPig]
#6203873
02/29/16 05:59 PM
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Joined: Aug 2011
Posts: 6,174
Tactical Cowboy
THF Trophy Hunter
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I would go 18 or 20, but I do like long barrels.
The secret to a long life is to try not to shorten it.
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Re: AR10 barrel length
[Re: J.G.]
#6203975
02/29/16 07:08 PM
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BigPig
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I want to see a 1:8 twist .30 cal.
The shorter barrel makes less velocity, that's all.
Look how short a .45 ACP pistol barrel is, and it stabilizes a 230 gr. 1:10 was thinking about my AR15 barrel So with that theory a 4.5" barrel is enough to stabilize a .30cal? The 45 is a lot shorter that the 30cal
Last edited by BigPig; 02/29/16 07:09 PM.
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Re: AR10 barrel length
[Re: BigPig]
#6204080
02/29/16 08:22 PM
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Joined: Aug 2012
Posts: 15,564
TexFlip
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12"
Just to make sure that it is done thoroughly, I go both ways.
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Re: AR10 barrel length
[Re: BigPig]
#6204144
02/29/16 09:14 PM
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Joined: Dec 2008
Posts: 41,163
J.G.
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I want to see a 1:8 twist .30 cal.
The shorter barrel makes less velocity, that's all.
Look how short a .45 ACP pistol barrel is, and it stabilizes a 230 gr. 1:10 was thinking about my AR15 barrel So with that theory a 4.5" barrel is enough to stabilize a .30cal? The 45 is a lot shorter that the 30cal I was trying to get the point across that a 1:10 twist 16" will stabilize just as well as a 1:10 twist 26", it will just make for a slower muzzle velocity.
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Re: AR10 barrel length
[Re: Tactical Cowboy]
#6204308
02/29/16 11:10 PM
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Joined: Jan 2013
Posts: 19,650
Pitchfork Predator
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Barrel length won't really matter, the twist rate is what will matter, and whether or not the AR10 happens to like that same load. I assume the bolt gun is 1:10 twist? Yes. Wasn't sure if barrel length and twist rate played a factor. Like if a 16 inch 1:8 wouldn't stable a 168 like a 24 inch 1:8 would. Prob going to run the 18 inch barrel than. My 16" 1:10 liked Chad's 168 Amax. Shot very well. Good to know. Prob going to hit him up for some of that to see if they both like it. I hate to say it, and it's no fault of Chad, but his bulk 168 that I got a year ago doesn't like my bolt gun. I would go 18 or 20, but I do like long barrels. My Wilson Combat is 20 and it really likes the bulk I got from Chad in 178 Amax.
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Re: AR10 barrel length
[Re: J.G.]
#6204587
03/01/16 02:01 AM
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Joined: Aug 2009
Posts: 22,716
BigPig
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I want to see a 1:8 twist .30 cal.
The shorter barrel makes less velocity, that's all.
Look how short a .45 ACP pistol barrel is, and it stabilizes a 230 gr. 1:10 was thinking about my AR15 barrel So with that theory a 4.5" barrel is enough to stabilize a .30cal? The 45 is a lot shorter that the 30cal I was trying to get the point across that a 1:10 twist 16" will stabilize just as well as a 1:10 twist 26", it will just make for a slower muzzle velocity. Ahh gotch
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Re: AR10 barrel length
[Re: BigPig]
#6204620
03/01/16 02:20 AM
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Joined: Apr 2013
Posts: 2,418
tenyearsgone
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I'd get the 20 inch. Unless you're going to be clearing rooms with it the loss in velocity isn't worth the loss in weight.
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