Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Alpine Terminator


User Tag List

+ Reply to Thread
Page 1 of 3 123 LastLast
Results 1 to 15 of 35
Like Tree72Likes

Thread: 308 Twist rates v projectile weights ?

  1. #1
    Member viper's Avatar
    Join Date
    Feb 2015
    Location
    Rabbitvegas
    Posts
    2,619

    308 Twist rates v projectile weights ?

    Much more knowledge on here than I have so I thought I would put the question out.

    I am looking at getting one of the Bergara single shot take down rifles in 308 win.
    They basically come in two options.
    1: 20 inch barrel with a 1/12 twist rate...or
    2: 16.5 inch barrel with a 1/8 twist.

    Either option will get suppressed with the 20 inch version probably chopped to 17 - 18 inchs as I want to take advantage of the take down feature and be able to fit it all in a backpack and only assemble it once required.

    I know the 1.8 will allow for heavier pills but will it stabilise pills down to 125gr ?

    Any advantages and disadvantages please let me know so I can make an informed decision on which version to get ....

    Cheers Viper

  2. #2
    Member
    Join Date
    Apr 2017
    Location
    The 'Naki
    Posts
    2,380
    16" 1:12 twist sends 200gn cast sideways - lol
    viper and Hearties like this.
    I know a lot but it seems less every day...

  3. #3
    Gone but not forgotten
    Join Date
    Apr 2017
    Location
    Hamilton
    Posts
    4,129
    I have the 16.5" version, I haven't tried 125gr but it's fine with 150s.

    The 16.5 doesn't have open sights, but if you chop the 20 I guess it won't either!
    Last edited by Cigar; 08-04-2022 at 02:29 PM.
    viper and Cordite like this.

  4. #4
    Member Micky Duck's Avatar
    Join Date
    Apr 2015
    Location
    Geraldine
    Posts
    24,451
    it will work fine..the worst it will do is make them more fragile as they will be spinning faster...but you can slow them down if thats too much of an issue.
    veitnamcam, viper and Cordite like this.

  5. #5
    Member
    Join Date
    Jun 2012
    Location
    Blenhiem
    Posts
    1,108
    I have no issues with a 1:7 12” barrel using 125 gr BT, TMK and SST. So a 1:8 should be fine.
    veitnamcam, viper and Micky Duck like this.

  6. #6
    Member
    Join Date
    Aug 2018
    Location
    Christchurch
    Posts
    1,643
    You've got it a bit backwards mate. The faster the twist, the heavier (longer) the bullets it will stabilise. The 1:8 twist is really fast - it'll have no problem at all stabilising 125gr (light, short) projectiles.

    Unless you plan on shooting subs, I'd get the 1:12. @flock has one for sale I think. 1:12 will stabilise everything supersonic up to 180gr no problem.
    viper and Micky Duck like this.
    Resident 6.5 Grendel aficionado.

  7. #7
    Member viper's Avatar
    Join Date
    Feb 2015
    Location
    Rabbitvegas
    Posts
    2,619
    Quote Originally Posted by Pommy View Post
    You've got it a bit backwards mate. The faster the twist, the heavier (longer) the bullets it will stabilise. The 1:8 twist is really fast - it'll have no problem at all stabilising 125gr (light, short) projectiles.

    Unless you plan on shooting subs, I'd get the 1:12. @flock has one for sale I think. 1:12 will stabilise everything supersonic up to 180gr no problem.
    Spoke to Flock but we couldn't quite get things to line up so now I have the choice of going for either option. Thanks for your input, I am not interested in playing around with sub sonic loads but 180gr plus might be an option to reach further out .

  8. #8
    Member
    Join Date
    Jun 2012
    Location
    Blenhiem
    Posts
    1,108
    Whats your plan how far and what animals are you targeting?

    I went out to the range this morning for a quick shot before the wind got up to much. Was using my 16” 308win with a 1:11 twist, 168gr A-max first round hit on steel out to 770m. This combo smashes reds very well out to 440m. Could also do this the same with 178gr ELD-m.

    Only a couple of inches off centre at 773m 19 degrees downhill in 3m/s wind so 300m and 400m is easy.

    veitnamcam, ANTSMAN, viper and 1 others like this.

  9. #9
    Member ANTSMAN's Avatar
    Join Date
    Dec 2011
    Location
    Wellington
    Posts
    2,495
    Quote Originally Posted by tikka View Post
    Whats your plan how far and what animals are you targeting?

    I went out to the range this morning for a quick shot before the wind got up to much. Was using my 16” 308win with a 1:11 twist, 168gr A-max first round hit on steel out to 770m. This combo smashes reds very well out to 440m. Could also do this the same with 178gr ELD-m.

    Only a couple of inches off centre at 773m 19 degrees downhill in 3m/s wind so 300m and 400m is easy.

    thats bloody good going!
    Micky Duck likes this.

  10. #10
    Member viper's Avatar
    Join Date
    Feb 2015
    Location
    Rabbitvegas
    Posts
    2,619
    Quote Originally Posted by tikka View Post
    Whats your plan how far and what animals are you targeting?

    I went out to the range this morning for a quick shot before the wind got up to much. Was using my 16” 308win with a 1:11 twist, 168gr A-max first round hit on steel out to 770m. This combo smashes reds very well out to 440m. Could also do this the same with 178gr ELD-m.

    Only a couple of inches off centre at 773m 19 degrees downhill in 3m/s wind so 300m and 400m is easy.

    @tikka , that's awesome mate, I won't or intend to shoot over 450 and hopefully mostly under that.
    So the Golden question is if you could start from scratch would you go for the 1.8 or 1.12 twist ?

  11. #11
    Member Micky Duck's Avatar
    Join Date
    Apr 2015
    Location
    Geraldine
    Posts
    24,451
    1;12 because it wont be as hard on soft projectiles going fast..... speer is good and cheap.
    viper likes this.

  12. #12
    Gone but not forgotten
    Join Date
    Apr 2017
    Location
    Hamilton
    Posts
    4,129
    I would still go with the 16' 1:8 I bought for shooting suppressed bush hunting with the dog.
    But I also have a 23.5" 1:12
    veitnamcam and viper like this.

  13. #13
    Member
    Join Date
    Jun 2012
    Location
    Blenhiem
    Posts
    1,108
    @viper
    For my style of hunting which is 80% stalking close on deer with the dog, high round count goat culling and preferably shooting heavy subs with a 300 blackout. The 308win is a stock standard tikka T3 chopped to 16” it has the factory 1:11 twist barrel and would rather have a 1:8 twist solely because I could run both Lehigh Defence subsonics and 168gr + heavy’s for longer range deer and goats across gully’s.

    Once the barrel is cooked will rebarrel to 1:8 twist, the other bonus of a factory 1:8 barrel is the resale is easier and more sort after now days if your not into it anymore.
    veitnamcam and viper like this.

  14. #14
    Member viper's Avatar
    Join Date
    Feb 2015
    Location
    Rabbitvegas
    Posts
    2,619
    Quote Originally Posted by tikka View Post
    @viper
    For my style of hunting which is 80% stalking close on deer with the dog, high round count goat culling and preferably shooting heavy subs with a 300 blackout. The 308win is a stock standard tikka T3 chopped to 16” it has the factory 1:11 twist barrel and would rather have a 1:8 twist solely because I could run both Lehigh Defence subsonics and 168gr + heavy’s for longer range deer and goats across gully’s.

    Once the barrel is cooked will rebarrel to 1:8 twist, the other bonus of a factory 1:8 barrel is the resale is easier and more sort after now days if your not into it anymore.
    @tikka , great answer mate, that's gone along way too helping me make a decision.

  15. #15
    Member
    Join Date
    Nov 2014
    Location
    Central Otago
    Posts
    2,259
    Go for the 1:12 which will handle 125 -150 grainers well. The heavier bullets are not needed where we are!
    viper and Cordite like this.

 

 

Similar Threads

  1. Rem 700/7 223 twist rates
    By Rock river arms hunter in forum Firearms, Optics and Accessories
    Replies: 12
    Last Post: 20-03-2022, 09:41 PM
  2. 250 savage 100gr projectile 1-14 twist?
    By 6.5 in forum Reloading and Ballistics
    Replies: 12
    Last Post: 06-03-2020, 01:31 PM
  3. 1-14 twist 19" barrel .243 projectile weight for deer under 200m
    By Strider B in forum Reloading and Ballistics
    Replies: 15
    Last Post: 06-01-2020, 08:40 AM
  4. 223 twist rates
    By Philipo in forum Reloading and Ballistics
    Replies: 28
    Last Post: 14-07-2019, 02:54 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!