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Rate of Twist for 308win

 
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  #1  
Old 08-23-2008, 07:53 PM
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Rate of Twist for 308win

Today I had the opportunity to shoot a Rem700 in 308win. It was pretty sweet, shooting slightly less than 1moa right out of the box. The rate of twist on the barrel was 1:12.

What's the bullet weight range for this rate of twist?
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Old 08-23-2008, 08:49 PM
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Re: Rate of Twist for 308win

I'm not sure what the heaviest/longest it will take, but I haven't heard any issues with them firing a 178 A Max or M118LR (175gr). On the low end, they'll work fine for a 110gr V Max.

And there's this...
208 AMax in 1/12 twist 308Win, Range Report
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Old 08-23-2008, 09:07 PM
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Re: Rate of Twist for 308win

We were shooting factory-loaded Remington 180grain round-nose soft points in this particular 1:12 twist 308. I was impressed with its out-of-the-box accuracy.

Given that my .280 is a 1:9 twist, I thought 1:12 for a 308 is fairly slow, so it would probably shoot lighter bullets better.

So my question remains....what is the optimal weight range for a 12 twist 308?
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Old 08-24-2008, 08:59 AM
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Re: Rate of Twist for 308win

Delete double post.

Last edited by Varmint Hunter; 08-24-2008 at 09:03 AM.
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  #5  
Old 08-24-2008, 09:01 AM
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Re: Rate of Twist for 308win

Many competitive shooters have said that a 12" twist (.308win) is all that is necessary to stabilize the 175gr SMK, which seems like the go-to bullet for several disciplines. However, you will occasionally find a 12" twist that won't work well with the 175's.

I think you should be fine with any bullet up to that weight/length.
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Old 08-24-2008, 12:10 PM
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Re: Rate of Twist for 308win

Quote:
Originally Posted by .280fan View Post

So my question remains....what is the optimal weight range for a 12 twist 308?

Whatever your testing tells you it is, and whatever your goal's are. Every rifle, and every bullet will be different, and one person's/brand's load of a certain grain bullet will be different than another. Rem has been using 1:12, with little to no complaints, and Savage has been using 1:10 with little to no complaints.
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Old 09-06-2008, 06:50 PM
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Re: Rate of Twist for 308win

The 1:12 twist works great with the 168 grain bullets from Sierra & Nosler. That's where I'd start, looking for accuracy with a 1:12. That twist often though will also handle a 175 SMK well.

Classic "Palma" loads use a 155 gr bullet and a 1:13 twist.
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