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270 WSM 165gr VLD load help

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  #15  
Unread 05-05-2011, 10:31 PM
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Re: 270 WSM 165gr VLD load help

Quote:
Originally Posted by bigngreen View Post
Any of the cut rifle barrel manufactures should be able to cut what ever twist you want. At one time Mcgowen offered a buttoned rifle barrel in 1-9 but I haven't seen it as an option for a year or so.

The 1-10 at my elevation (5612, 40*) with the 165 Matrix has a Miller stability factor of 1.49 and in a 1-9 twist a factor of 1.84 and the 1-8 a 2.33.


The numbers you use for stability factor, 1-10 twist at 1.49, is the lower number better or the 1-8 twist at 2.33?
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  •   #16  
    Unread 05-05-2011, 11:30 PM
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    Re: 270 WSM 165gr VLD load help

    The 1-10 is on the edge of the slow end which seems to have some good points but I would be happier with a 1-9. According to what I'm getting, I'm barely stable but at 1-8 just into over stable range, what it totally means I'm still learning!
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      #17  
    Unread 05-05-2011, 11:35 PM
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    Re: 270 WSM 165gr VLD load help

    Quote:
    Originally Posted by bigngreen View Post
    The 1-10 is on the edge of the slow end which seems to have some good points but I would be happier with a 1-9. According to what I'm getting, I'm barely stable but at 1-8 just into over stable range, what it totally means I'm still learning!
    Marshal Ambrose from Matrix Ballistics replied that 1-9 twist is the recommended twist for 165gr and 175gr 0.277 Hunting VLDs. The 165gr will stabilize in 1-10 twist under most conditions (sea level and temp over 40F) but the 175 will not.

    Alex
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      #18  
    Unread 05-07-2011, 01:46 AM
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    Re: 270 WSM 165gr VLD load help

    well the good news is that the matrix bullets are shooting and as of the other day I can say that they work on game also I used a 175 out of my wife's Aps 270wsm on a big black bear at 862yrds and he folded right up unfortunately did not recover the bullet but there was a golf ball size exit so that tells me that they hold up on game
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      #19  
    Unread 05-07-2011, 10:48 AM
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    Re: 270 WSM 165gr VLD load help

    Sounds to me like they work......Rich
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      #20  
    Unread 05-07-2011, 06:56 PM
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    Re: 270 WSM 165gr VLD load help

    Quote:
    Originally Posted by pitbull320 View Post
    well the good news is that the matrix bullets are shooting and as of the other day I can say that they work on game also I used a 175 out of my wife's Aps 270wsm on a big black bear at 862yrds and he folded right up unfortunately did not recover the bullet but there was a golf ball size exit so that tells me that they hold up on game
    Excellent!!!
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      #21  
    Unread 05-07-2011, 07:14 PM
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    Re: 270 WSM 165gr VLD load help

    Quote:
    Originally Posted by pitbull320 View Post
    well the good news is that the matrix bullets are shooting and as of the other day I can say that they work on game also I used a 175 out of my wife's Aps 270wsm on a big black bear at 862yrds and he folded right up unfortunately did not recover the bullet but there was a golf ball size exit so that tells me that they hold up on game
    Congradulations for you long range black bear!
    What was the twist of the rifle used and what load did you use?

    Alex
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