20" barrel twist/port size advice

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bigbuck28
New Member
Posts: 6
Joined: Tue Feb 02, 2016 10:07 am
.204 Ruger Guns: 204 ruger AR custom

20" barrel twist/port size advice

Post by bigbuck28 »

Im having a barrel builder make me a 20" barrel for my upper. He asked me for the specs. I have 2 questions
~.920 seems to be standard on the port size so I used that. Does that sound like that would work with a rifle length gas system?

~ twist- I was thinking about 1:10 but am strongly leaning towards the 1:12 now as I have had really good luck with the 35g Bergers... I know even the berger box says to use 1:14 but Im scared getting stuck with the 35g and them not liking my barrel... Any advice or suggestions would be greatly appreciated..
I
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TEXAS222
Senior Member
Posts: 291
Joined: Sun Oct 19, 2014 8:09 pm
.204 Ruger Guns: custom build AR 15-Rem 700 .204 VARMINT- .204 Kimber Pro Var
Location: Southeast Texas

Re: 20" barrel twist/port size advice

Post by TEXAS222 »

Hey bigbuck28, I assume you are talking about a .204 Ruger caliber since you said 35 Berger's. I don't know about port size but whatever White Oak Armory drills theirs works for me. Also my WOA 204 24" barrel is a 1-10 twist & it really likes 35 Berger's. On the other hand, my Kimber Pro Varmint 204 has a 1-12 twist & it loves 35 Berger's & CFE. I guess you need to decide if you think you will ever want to shoot 40's because a lots of 1-12's won't shoot them worth a flip. Just my 2 pennies worth.
Jim D :shrug:
bigbuck28
New Member
Posts: 6
Joined: Tue Feb 02, 2016 10:07 am
.204 Ruger Guns: 204 ruger AR custom

Re: 20" barrel twist/port size advice

Post by bigbuck28 »

Thanks for the reply.. Hmm something to think about... I shot a dozen or so coyotes with the 35g bergers... Im just hoping my barrel will like them..
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