Twist rates effect on accuracy?

Bryan8

Bryan8

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Help me out with this. Lets work with a .223 for example.

Assuming both .223's are shooting the same exact load with a 55g bullet, would one get better accuracy with one twist rate verus the other? Say one was a 1x7 twist and one was a 1x9, providing both could stabilze the bullet would one have an accuracy advantage?

Bryan
 
Originally Posted By: dmpowderTwist rate will not have a effect.

Twist rate has NO effect on accuracy!

I beg to differ. Fire a 77 gr bullet out of that 1-9 twist and tell me twist doesn't have an effect on accuracy.

You may not see a big difference with the 55 gr bullet but try the 77 gr.


 
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Originally Posted By: joedOriginally Posted By: dmpowderTwist rate will not have a effect.

Twist rate has NO effect on accuracy!

I beg to differ. Fire a 77 gr bullet out of that 1-9 twist and tell me twist doesn't have an effect on accuracy.

You may not see a big difference with the 55 gr bullet but try the 77 gr.




Yeah, I knew that would come into play, hence why I stated if it could stabilize it! Thanks for the info guys
 
Originally Posted By: Bryan8Help me out with this. Lets work with a .223 for example.

Assuming both .223's are shooting the same exact load with a 55g bullet, would one get better accuracy with one twist rate verus the other? Say one was a 1x7 twist and one was a 1x9, providing both could stabilze the bullet would one have an accuracy advantage?

Bryan



In this example, both twist rates will actually give the bullet more RPM than needed to stabilize a 55gr bullet.


MV x 720/ Twist rate = RPM.

Will twist rate effect accuracy? Of course it will.

If you spin a thin jacketed bullet faster than it's rated RPM it can cause the the bullet to come apart or start to in the distance to the target. That makes for a unstable bullet.

If you don't spin a bullet fast enough it will not be stable in flight, period.

Benchrest shooters try to twist their barrels at a rate just fast enough [RPM] to stabilize the bullet they are shooting. They could go with faster than needed twist rates but they are not as accurate.

Potentially, in the example you gave, the 1-9 twist could prove to be more accurate than the 1-7. However the 1-7 twist has the potential to be more explosive on impact because of the extra RPM.

Bullet makers will provide the ideal RPM for their bullets. You can then match them to your application.
 
Originally Posted By: SmokelessOriginally Posted By: Bryan8Help me out with this. Lets work with a .223 for example.

Assuming both .223's are shooting the same exact load with a 55g bullet, would one get better accuracy with one twist rate verus the other? Say one was a 1x7 twist and one was a 1x9, providing both could stabilze the bullet would one have an accuracy advantage?

Bryan



In this example, both twist rates will actually give the bullet more RPM than needed to stabilize a 55gr bullet.


MV x 720/ Twist rate = RPM.

Will twist rate effect accuracy? Of course it will.

If you spin a thin jacketed bullet faster than it's rated RPM it can cause the the bullet to come apart or start to in the distance to the target. That makes for a unstable bullet.

If you don't spin a bullet fast enough it will not be stable in flight, period.

Benchrest shooters try to twist their barrels at a rate just fast enough [RPM] to stabilize the bullet they are shooting. They could go with faster than needed twist rates but they are not as accurate.

Potentially, in the example you gave, the 1-9 twist could prove to be more accurate than the 1-7. However the 1-7 twist has the potential to be more explosive on impact because of the extra RPM.

Bullet makers will provide the ideal RPM for their bullets. You can then match them to your application.



Between the twist that will fail to stabilize the bullet, and the twist rate that will cause it to self destruct, there is a lot of room to play.

In that "room to play", there is not much to go on.

Sure, benchrest guys say spin it as slow as possible for best accuracy, but the differences that are important to them, do not show up on "our" targets - they are worried with the last
 
Originally Posted By: CatShooterOriginally Posted By: SmokelessOriginally Posted By: Bryan8Help me out with this. Lets work with a .223 for example.

Assuming both .223's are shooting the same exact load with a 55g bullet, would one get better accuracy with one twist rate verus the other? Say one was a 1x7 twist and one was a 1x9, providing both could stabilze the bullet would one have an accuracy advantage?

Bryan



In this example, both twist rates will actually give the bullet more RPM than needed to stabilize a 55gr bullet.


MV x 720/ Twist rate = RPM.

Will twist rate effect accuracy? Of course it will.

If you spin a thin jacketed bullet faster than it's rated RPM it can cause the the bullet to come apart or start to in the distance to the target. That makes for a unstable bullet.

If you don't spin a bullet fast enough it will not be stable in flight, period.

Benchrest shooters try to twist their barrels at a rate just fast enough [RPM] to stabilize the bullet they are shooting. They could go with faster than needed twist rates but they are not as accurate.

Potentially, in the example you gave, the 1-9 twist could prove to be more accurate than the 1-7. However the 1-7 twist has the potential to be more explosive on impact because of the extra RPM.

Bullet makers will provide the ideal RPM for their bullets. You can then match them to your application.



Between the twist that will fail to stabilize the bullet, and the twist rate that will cause it to self destruct, there is a lot of room to play.

In that "room to play", there is not much to go on.

Sure, benchrest guys say spin it as slow as possible for best accuracy, but the differences that are important to them, do not show up on "our" targets - they are worried with the last
 
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