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Thread: 308 Win. twist rate?

  1. #11
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    Quote Originally Posted by markm View Post
    My 12 twist REM 700.308 shoots 175s great. 20 inch barrel.... That 26 inch barrel is going to give you more velocity, and thus, more RPMS on the bullet.

    I used to think that was B.S. until I down loaded some long bullets to sub sonic in my gun.... they key holed. But at full velocity, they shot round holes.

    My 1/12 actually hates 168 smk at 1000 yards because the shape of the boat tail makes them suck in trans-sonic. I get a 12 yard spray zone of possible bullet impacts. But with 175s, I can get out to 1300 yards.
    I have a Rem M700 in 300BO. It is 1 in 7 twist.

  2. #12
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    Quote Originally Posted by maximus83 View Post
    What I haven't tried yet--and would like to this summer--is to see what the 1:12 factory barrel's upper limit is. For instance, I wonder if it'll struggle with a heavy load designed for long range, something in 180/185gr like the Berger Juggernaut.
    A friend of mine has a 1:12 sps and was able to shoot the 208 amax with really good results. They had to be single loaded, and we were around 5000ft, but they worked well for him. The 185gr juggernaut also shot really well for him.

    Sent from my SM-G950U1 using Tapatalk

  3. #13
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    Quote Originally Posted by pyrotechnic View Post
    A friend of mine has a 1:12 sps and was able to shoot the 208 amax with really good results. They had to be single loaded, and we were around 5000ft, but they worked well for him. The 185gr juggernaut also shot really well for him.

    Sent from my SM-G950U1 using Tapatalk
    Great info, thanks. I would not have guessed that the factory 1:12 could handle a 208gr bullet very well. I'll be content with mine if it can do well the 185gr Bergers, those are the ones I'm interested in.

  4. #14
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    Thanks for all the input, I really appreciate it!

    NYH1.

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  5. #15
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    Quote Originally Posted by maximus83 View Post
    Great info, thanks. I would not have guessed that the factory 1:12 could handle a 208gr bullet very well. I'll be content with mine if it can do well the 185gr Bergers, those are the ones I'm interested in.
    I shot the 185 Juggernaut out of my factory Remington 1:12 barrel and they did better than 175 smk’s at range (4-500m). No idea about groups close in though.

  6. #16
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    As another reference point, my .308 Bartlein 1:10 5R (23 inches) shoots the 180 grain Federal Fusion better than any other factory load, in the .35 MOA range at 200 yards. I have to imagine the terminal ballistics are pretty good too.

  7. #17
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    I stopped out to Bass Pro today to get my pop's a few shirts. Grabbed a couple boxes of the 175gr. while I was there. Hopefully it'll stop raining and I'll be able to see how they shoot. I put together a 14.5" SOCOM upper last week I want to put some more round through too.

    NYH1.

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  8. #18
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    It shoots the 175's as well as it shoots the 168's, at least out to 200 yds. Had to move the group about a 1/2 inch left, elevation was fine. Also put some more rounds through the new SOCOM upper build!

    NYH1.

    Take nothing I say personal, remember....it's just the interweb!
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  9. #19
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    Quote Originally Posted by Canonshooter View Post
    As another reference point, my .308 Bartlein 1:10 5R (23 inches) shoots the 180 grain Federal Fusion better than any other factory load, in the .35 MOA range at 200 yards. I have to imagine the terminal ballistics are pretty good too.
    That damn Fusion is a good factory load. I bought some one time and was shocked.

    PB
    "Air Force / Policeman / Fireman / Man of God / Friend of mine / R.I.P. Steve Lamy"

  10. #20
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    I have a 700 PSS produced in 1993. It is a 24”, 1:12” twist barrel. It handles both 175 gr Federal GMM and my hand loads fine. In fact, the factory Federal is typically sub 1/2 MOA groups for five rounds. I’ve taken it to 900 yards and managed 4-5” groups. I think you’ll be fine, but every barrel is different. Just give it a try.





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