1:10 vs 1:12 .308 Which is better all around(er)

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deepcore

New member
Which twist rate is a better all around jack of all trades?
Keeping bullet weight ranges between 147 grains and 175 grains.

Looking at a new Remy 700 and trying to choose between the varmint 26 incher in 1:12 and the AAC 20 incher in 1:10.
 
1:10 ROT

Yep, all of my 7.62/.308 barrels have a 1:10 ROT...
I shoot everything from 147 grain NATO right up to 180 grain
subsonic 7.62 x 51 though a suppressor with excellent results.
 
I think you have to make a choice as to which rifle you want to buy and you get whatever that rifle has vs which is the best twist.

Remington puts 1/10 twist on their short barrel 308 rifles and the 308 Varmint rifle 26" long barrel has 1/12 and their 308 tactical has 1/11.25r barrel.

The short barrel your looking at is suppressor ready. My gunsmith is a dealer for LMT rifle and his demo rifle is the 308 short barrel 1/11.25r twist and you think Rem would of used their 1/11.25r twist on that rifle and maybe it's pricing.

I'm not a fan of 1/10 twist 30 cal barrels so I'd vote for 1/12 twist barrel.
 
Just go with 1/10

Heavyer bullets move less in the wind, and a faster twist stableizes heavyer bullets better. To get the most out of this round a 1/10 twist is probably the best to go with.
 
I think I'll just stick with my 12 twist in .308 for up to 175 gr., especially if the bbl length is shorter. If I am shooting heavier bullets I'll go with a 10 twist in '06 or 300 Win Mag.
 
Ther is no problem shooting 168 Amax or SMK or 175 grain SMK out of a 20 inch in 1-10 at 300 yards . You don't need a 26 inch barrel for a .308 . A 20 in a 1-10 is going to be what you want . ;)
 
'06 stuff, but...Years back I did a lot of varmint hunting with 110-grain bullets. My 1:10 twist let me get nice, tight groups. Works okay with the Sierra 180 SPBTs, as well. And, just for fun, adequate with 80-grain pistol bullets.

Odds are that a 1:12 is a bit slow for anything over a 165, but that's a bit of a "sorta-educated" guess. :)
 
I run 180g SGKs out of my gas gun with a 1:12 bull barrel. No stabalization problems to report even in cold conditions.
 
My Sako .308 is 1/11 and shoots just great. Too fast and it can cause problems and increase barrel wear depending on the bullet being used. I've seen 1/10, 1/11 and 1/12 used by reputable MFG's. There may even be others?

Use this formula for the specific bullet you plan to use.

TWIST rate = D2 C / L x (sq root of ) SG/10.9
Where:
• C = 150 (*180 for muzzle velocities higher than 2,800 f/s)
• D = bullet's diameter in inches
• L = bullet's length in inches
• SG = bullet's specific gravity (10.9 for lead-core bullets)
 
HK beat me to it.

11.25 ;) i've shot 155s, 168s, and 175s through mine all sub-MOA. I wouldn't hesitate to go to 180-190 either. It might be the very limit of the 11.25 stabilizing the longer projectiles. I'll never have a .308 bolt rifle barreled with anything else than 1:11 or 11.25.
 
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