My son is wanting to build an AR 10. It’s for punching paper at distance. Probably up to 700ish yards or so.
Is there a big difference between 18” & 20” barrels? Factory ammo btw.
Barrel length question
Re: Barrel length question
Never mind. He just ordered an 18” upper. Says it was too cheap to pass up. Idk what he ordered or from where
Re: Barrel length question
I was shooting 800yrds with a 20” .308 (bolt gun) yesterday and today. Shooting 8” steel. 
Talent hits a target no one else can hit; Genius hits a target no one else can see.
Re: Barrel length question
20" seems to work fairly well for consuming and making use of a .308's powder charge. Certainly by 16", they get REALLY blasty - a lot of energy going to waste.
WWJMBD?
I believe we should stand on Ceremony. . . while our friends handcuff the sanctimonious little prick and take him away.
I believe we should stand on Ceremony. . . while our friends handcuff the sanctimonious little prick and take him away.
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shotgunshooter3
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Re: Barrel length question
It's a little late now since he ordered one already, but this is interesting for science purposes:
https://rifleshooter.com/2014/12/308-wi ... 8-to-16-5/
https://rifleshooter.com/2014/12/308-wi ... 8-to-16-5/
"Speed is the economy of motion" - Scott Jedlinski
Re: Barrel length question
Thanks for your replies. I forwarded that article to him
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shotgunshooter3
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Re: Barrel length question
Rifle Shooter has a whole series where they cut down various cartridges from 26-28 down to 16 or so in 1" increments and record the results. I've found them very useful for a few cartridges.
"Speed is the economy of motion" - Scott Jedlinski
Re: Barrel length question
Interesting articleshotgunshooter3 wrote: ↑Sat Aug 12, 2023 12:55 pm It's a little late now since he ordered one already, but this is interesting for science purposes:
https://rifleshooter.com/2014/12/308-wi ... 8-to-16-5/
"Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it." - Samuel Clemens (aka Mark Twain)
Re: Barrel length question
I was just researching the same topic for an AR10 build and had settled on 20in minimum. Expected range was 300.
Since the barrel has been ordered the ONLY possible solution is to build two rifles. The first with the short barrel can serve as the prototype. Then the long barrel version can get the upgraded gas check, grip, bolt, high end stock, a top end scope.
I’m really trying to get my enabler merit badge
Since the barrel has been ordered the ONLY possible solution is to build two rifles. The first with the short barrel can serve as the prototype. Then the long barrel version can get the upgraded gas check, grip, bolt, high end stock, a top end scope.
I’m really trying to get my enabler merit badge
Re: Barrel length question
Lol!!
He’s got a baby coming in November. His gun buying days are over for a while.
He’s got a baby coming in November. His gun buying days are over for a while.
Re: Barrel length question
The author kept going with that barrel down to 6"
https://rifleshooter.com/2016/02/308-wi ... -bolt-gun/
https://rifleshooter.com/2016/02/308-wi ... -bolt-gun/
I take no pleasure in the death of the wicked, but rather that they turn away from their ways and live. Eze 33:11
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bullsi1911
- Posts: 1217
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Re: Barrel length question
I thought it wasn’t the length, but how you use it.
To make something simple is a thousand times more difficult than to make something complex.
-Mikhail Kalashnikov
AKA ‘Admin’
-Mikhail Kalashnikov
AKA ‘Admin’
Re: Barrel length question
I’ve done very well with a short barrel.
2 kids.
And a lifetime supply of deer, pigs, and varmints.
16” works well.
2 kids.
And a lifetime supply of deer, pigs, and varmints.
16” works well.
Talent hits a target no one else can hit; Genius hits a target no one else can see.