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6.5mm keyhole at 500 yds.

 
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  #8  
Old 03-26-2011, 10:21 AM
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Re: 6.5mm keyhole at 500 yds.

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Originally Posted by liltank View Post
Scenar's are known for not opening up either.

Tank

Roger that!!!
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  #9  
Old 03-26-2011, 10:51 AM
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Re: 6.5mm keyhole at 500 yds.

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Originally Posted by markb1951 View Post
Do you think that 1 in 8 twist should have stabilized the bullet, or am I missing something?
One would think the 8 twist would be sufficient.

The Stability Factor (SF) for a bullet to maintain stable flight for general shooting and paper punching is lower the the SF required for terminal penetration.
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  #10  
Old 03-26-2011, 11:31 AM
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Join Date: Mar 2011
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Re: 6.5mm keyhole at 500 yds.

I think you should perform another test. Shoot the ceiling tile without anything in front of it. I be you will only have a hole there. Once the bullet goes through the jug of water it probably loses enough energy/velocity that it becomes unstable.

I am surprised that the water jug didn't blow apart though. Did you have a cap on it or was it open?

Good luck.

Scott
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  #11  
Old 03-26-2011, 11:36 AM
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Re: 6.5mm keyhole at 500 yds.

Quote:
Originally Posted by Specialized Dynamics View Post
I think you should perform another test. Shoot the ceiling tile without anything in front of it. I be you will only have a hole there. Once the bullet goes through the jug of water it probably loses enough energy/velocity that it becomes unstable.

I am surprised that the water jug didn't blow apart though. Did you have a cap on it or was it open?

Good luck.

Scott
I have shot the ceiling tile before using it as target backing and it showed a nice hole.

The jug was capped and full to within an inch.

Still have no idea why the jug didn't open up.
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  #12  
Old 03-26-2011, 11:37 AM
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Re: 6.5mm keyhole at 500 yds.

Quote:
Originally Posted by MontanaRifleman View Post
One would think the 8 twist would be sufficient.

The Stability Factor (SF) for a bullet to maintain stable flight for general shooting and paper punching is lower the the SF required for terminal penetration.
Thanks for the heads up on SF. Is there any reading material available to further my education?
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  #13  
Old 03-26-2011, 11:41 AM
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Re: 6.5mm keyhole at 500 yds.

Quote:
Quote:
Originally Posted by Specialized Dynamics View Post
I think you should perform another test. Shoot the ceiling tile without anything in front of it. I be you will only have a hole there. Once the bullet goes through the jug of water it probably loses enough energy/velocity that it becomes unstable.

I am surprised that the water jug didn't blow apart though. Did you have a cap on it or was it open?

Good luck.

Scott
A bullet's KE really doesn't have anything to do with stability. And once the bullet leaves the muzzle, the slower it gets as it goes down range, the more stable it becomes. The reason is that the bullet's rate of spin remains constant as it slows down. It would actually have a better chance of penetrating in a straight path @ 1000 yds vs 500.
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  #14  
Old 03-26-2011, 11:47 AM
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Re: 6.5mm keyhole at 500 yds.

Quote:
Quote:
Originally Posted by markb1951 View Post
Thanks for the heads up on SF. Is there any reading material available to further my education?
You could do a net search on the subject... I learned this from conversations with the makers of GS Custom bullets. They list required SF's for their bullets based on application.

GS CUSTOM BULLETS - Specifications for use
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