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Barrel Twist Rate |
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Wing master 
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AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 8029 |
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 Topic: Barrel Twist RatePosted: 08 December 2024 at 14:55 |
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How is the best way to determine what bullet weight will be the best with a specific twist rate?
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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d4570
.416 Rigby
Joined: 27 January 2004 Location: United States Status: Offline Points: 9961 |
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Posted: 08 December 2024 at 19:13 |
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Most bullet places will tell you the best or minimum twist. It's more of a length thing.
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Remember: Four boxes keep us free ,the soap box, the ballot box, the jury box, AND the cartridge box
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BEAR
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Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 14390 |
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Posted: 09 December 2024 at 10:36 |
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There are a number of equations for stability.
This as a fast way: https://bergerbullets.com/twist-rate-calculator/
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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Wing master
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AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 8029 |
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Posted: 09 December 2024 at 11:36 |
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Thanks guys.
That brings up more questions. Do you achieve the best accuracy with a twist rate that just barely stabilizes your bullet or one that over spins it?
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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BEAR
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Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 14390 |
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Posted: 12 December 2024 at 08:27 |
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Too much, too little, not good. underspin is better than over spin in my opinion
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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Wing master
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AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 8029 |
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Posted: 12 December 2024 at 20:25 |
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I'll keep that in mind next time I have a rifle re-barreled. I have been thinking about it a lot lately.
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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BEAR
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Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 14390 |
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Posted: 15 December 2024 at 09:44 |
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Most barrel makers have a std twist per cartridge, but let you go faster for slower heavy bullets or faster twist for fast light bullets.
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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Wing master
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AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 8029 |
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Posted: 15 December 2024 at 17:49 |
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That's how I understand it too Bear.
When my gunsmith ordered the barrel for my Swede he, for some reason, wanted a 1 in 8.5 twist rate. The standard is 1 in 8. It took longer to get the barrel but he was able to get what he wanted from Brux Barrels. |
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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BEAR
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Joined: 07 September 2013 Location: Appalachian Mtn Status: Offline Points: 14390 |
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Posted: 16 December 2024 at 07:01 |
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I think the 1:8.5 is a good twist for the 123 gr bullets. Especially if you are shooting hotter loads.
My 6.5-08 has 1:8, which is std compromise barrel.
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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d4570
.416 Rigby
Joined: 27 January 2004 Location: United States Status: Offline Points: 9961 |
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Posted: 16 December 2024 at 09:20 |
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We got the GDs barrel in 1x7 from Shaw. If the throat is long enough we could run very long bullets. With the new bullet construction, I don't think you can over-spin a bullet.
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Remember: Four boxes keep us free ,the soap box, the ballot box, the jury box, AND the cartridge box
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BEAR
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Posted: 16 December 2024 at 19:10 |
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I shot that Creedmore, with 123 grs really accurate on plains rats.
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“ The IQ and the life expectancy of the average American recently passed each other in opposite directions.”
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Wing master
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AKA StraightShooter Joined: 10 June 2003 Location: United States Status: Offline Points: 8029 |
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Posted: 16 December 2024 at 20:15 |
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My hunting load for the Sweed uses 130 grain bullets. I have loaded 140 and 142 grain bullets with equally good results.
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I have always considered myself to be quite the bullshitter, But ocasionally it is nice to sit back and listen to a true professional......So, Carry on.
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