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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 02-08-2010, 11:56 PM
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Default 308 twist rate

Guys im looking at getting a new shilen barrel in 308. They have multiple twist rates. i would like to be able to tap out to 1k yards soon, and would like some help on twist rate and barrel length. I was thinking either 10 or 12 twist rate on the 26 inch barrel.

Also im going to be needing a new stock as this is will be a bull barrel and i currently have a sporter contour. I have read that the bell and carlson are great for the price. any input would be much appreciated.

thanks
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Old 02-09-2010, 12:38 AM
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If you are getting a new barrel, make it a 6.5 caliber with an 8.5" twist and chamber it for 260.
Then shoot 142gr SMK's.
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Old 02-09-2010, 2:37 AM
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I would say try and go with a 1:11. Its inbetween and gives great accuracy in my experience.
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Old 02-09-2010, 7:16 AM
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Quote:
Originally Posted by ar15barrels View Post
If you are getting a new barrel, make it a 6.5 caliber with an 8.5" twist and chamber it for 260.
Then shoot 142gr SMK's.
Lol. This is the best answer.

For 30 cal, 10 twist will give you more options. As for the stock, what kind of rifle?
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Old 02-09-2010, 7:35 AM
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What are the practical differences between 1:10, 1:11 and 1:12 for .308 ?
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Old 02-09-2010, 7:40 AM
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Quote:
Originally Posted by ar15barrels View Post
If you are getting a new barrel, make it a 6.5 caliber with an 8.5" twist and chamber it for 260.
Then shoot 142gr SMK's.
This is the upper Iím looking at right now for my latest 80% build.
Any recommendations as to alternative uppers/barrels are more than welcome, as Iím new to the .308 platform.
http://www.dpmsinc.com/store/product...=1991&cat=1605

The lower is a Tactical Machining DPMS .308 style.
http://www.tacticalmachining.com/products.php?pid=34
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Old 02-09-2010, 8:24 AM
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Quote:
Originally Posted by Hoop View Post
What are the practical differences between 1:10, 1:11 and 1:12 for .308 ?
The difference is 210gr bullets, 190gr bullets and 175gr bullets.
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Old 02-09-2010, 8:42 AM
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Here is a general chart supplied by Brownells for 308 twists and bullet recomendations. The 1:11 is not listed. It is a realtively new comer and was designed around the 175 - 190 grn bullets.

308
8" For bullets heavier than 220 gr.
10" For bullets up to 220 gr.
12" For bullets up to 170 gr.
14"* For bullets up to 168 gr.
15"* For bullets up to 150 gr.

The 1:12 is generally the choice if you're usung the 168 gr SMK or Lapua's 170 gr; but it will also handle 175SMKs if they are pushed hard, above 2650.
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Old 02-09-2010, 2:16 PM
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Quote:
If you are getting a new barrel, make it a 6.5 caliber with an 8.5" twist and chamber it for 260.
Then shoot 142gr SMK's.
This but with the 139 Laupa's

Also If i was going a custom barrel I'd go Krieger over Shilen.

For 308 to 1k+ Kreiger 5r 1:11 24"+

What action are you using?

I've taken my 308 to 1250yds Surgeon 591, 26" Krieger 5r 1:10, 175Nosler CC 44.6g Varget Laupa brass 210m 2720fps @ muzzle. From memory I believe I had 45.5-46 MOA @ 3k'

Last edited by lazuris; 02-09-2010 at 2:26 PM..
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Old 02-09-2010, 2:37 PM
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What action are you using? not that I know anything about barrels i am just interested in what your doing
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Old 02-09-2010, 5:39 PM
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i'd go 1:10, even though i have no issues shooting 175smk from a 24" 1:11.25 barrel @ 1k. if you think you really want to shoot heavier projectiles than 175 out of a .308 bullet, i'd look into a 300WM- just dont forget the recoil pillow
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Old 02-09-2010, 5:42 PM
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sorry its a savage model 110. im working on getting funds to upgrade it as its all stock right now. wanted to get the barrel and the stock then scope and trigger.
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Old 02-09-2010, 9:41 PM
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Quote:
Originally Posted by Rbutler View Post
sorry its a savage model 110. im working on getting funds to upgrade it as its all stock right now. wanted to get the barrel and the stock then scope and trigger.
If you are looking at upgrading the barrel, stock, trigger and scope, you really should just sell that gun and get a 700...
It would be such a shame to build out that gun, only to find out about all the inherent shortcomings after you spent the money.
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Old 02-10-2010, 1:07 AM
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hhmmmm at the moment i just had my first kid so budgets too tight to get a new gun so maybe ill just get the barrel, and save myself the real build for a 700.
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Old 02-10-2010, 9:28 AM
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Quote:
Originally Posted by Rbutler View Post
hhmmmm at the moment i just had my first kid so budgets too tight to get a new gun so maybe ill just get the barrel, and save myself the real build for a 700.
If your gonna go the 700 route it would make sense to just sell the Savage, add the money you would spend on a barrel to that and you'll easily be able to get a 700. Rather than putting money into a black hole that you will end up selling for far less than you put into it, just so you can fund the 700 later..

I'm not endorsing the 700 or bashing the Savage just saying it makes sense to me to get it now rather than put hundreds into your savage than buy the 700 later.
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