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My New Defensive Edge LRKM

 
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  #85  
Old 07-06-2013, 08:22 PM
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Re: My New Defensive Edge LRKM

Quote:
Originally Posted by Broz View Post
The Terminator and the AI are close in comparison. But when you add the Defensive Edge +P to the mix it becomes a new ball game and allows loading up for up to 200 additional FPS with 300 gr bullets over a standard LM AI.

Jeff
Are you saying the 338edge +p is running 300 grainers 3200 fps? I thought it was 3000-3050.

Wait this is not on a RUM case but a blown out 338 lapua case?
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  #86  
Old 07-06-2013, 08:34 PM
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Re: My New Defensive Edge LRKM

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Originally Posted by BountyHunter View Post
Are you saying the 338edge +p is running 300 grainers 3200 fps? I thought it was 3000-3050.

Wait this is not on a RUM case but a blown out 338 lapua case?
No, I am talking about my LRKM which is the first one built in the .338 Terminator +P. It is indeed a blown out 338 LM case with the +P addition. Here is the chronograph pic below which mirrors what Shawn got with initial testing of this rifle with a different chronograph.

Jeff


My New Defensive Edge LRKM



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Last edited by Broz; 07-06-2013 at 09:07 PM.
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  #87  
Old 07-07-2013, 06:34 AM
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Re: My New Defensive Edge LRKM

No doubt the LRKM throat and chamber design has brought more velocity to the package.

My 338 LM Improved (122 gr. H20 - Lapua headstamp brass) runs a steady 3,000-3,050 fps w/ 300 SMKs @ Retumbo. 3,200 fps is beyond my current capabilities w/ Retumbo - working up a VV570 load currently, but its not going to be 3,200 fps.

Jeffvn
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  #88  
Old 07-07-2013, 10:47 AM
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Re: My New Defensive Edge LRKM

Any ideas as to what could happen with a 338-408 cheytac with this +P chamber? Would it even work?
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  #89  
Old 07-07-2013, 10:53 AM
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Re: My New Defensive Edge LRKM

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Originally Posted by webs View Post
Any ideas as to what could happen with a 338-408 cheytac with this +P chamber? Would it even work?
A guess would be an additional 150 fps from the normal 338-408. But that is only a guess from what I have seen it do for other calibers.

Another though it the point of diminishing returns. You can run any caliber to the point it is not practical or has a very low round count capability. I am hopeful the 338 Terminator +P is not to that point.

Jeff
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  #90  
Old 07-07-2013, 12:46 PM
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Re: My New Defensive Edge LRKM

A 338-408 CT would probably have a very short barrel life even if it was nitrided. I'll be interested to see the barrel life Jeff get's before the throat get's too long. I'm guessing under 1000rds.
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  #91  
Old 07-07-2013, 01:14 PM
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Re: My New Defensive Edge LRKM

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Originally Posted by IdahoCTD View Post
I'm guessing under 1000rds.
We will see, the original 338 EDGE +P is still going and has seen over 3100 at times if I understand correctly. Don't quote me on this but I think it is right at 0r 0ver 1000 rounds now and still shooting. This is from memory and I have not seen actual results though. So I am optimistic and hoping for 1500. If it dies at 1000 I will do it again with a melonited barrel and see how that works. Only time will tell.

jeff
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