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Reloading Berger Bullets

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.300wm confusion

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  #1  
Unread 06-14-2013, 10:03 AM
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Join Date: Feb 2011
Posts: 225
.300wm confusion

Ok folks, i went to the range a couple days ago to develop a new hunting round for my 300wm its an Abolt II

I found a load that appeared promising which included 185gr Bergers with 73.5gr of H4831. This printed a .6ish group that included 1 flier.

I went back out yesterday to chrony the new load and im confused by the results.

Here is the first three out on my rifle. Note the rifle was not cleaned prior, so it was already fouled.





Frusterated, i switched to another target about 8 inches above this one and here is the result.




Im confused, I checked the scope, action screws, etc. everything seems torqued down to spec.

What are you guys thinking?

TKS
JPB
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  •   #2  
    Unread 06-15-2013, 10:13 AM
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    Join Date: Nov 2010
    Location: deer park, wa 99006
    Posts: 152
    Re: .300wm confusion

    Could it be that for the first group your ammo was warmer/colder than ambient temp from the car.then when you shot the second group it had cooled or warmed up to ambient. This could make it change speed and take you out of your node
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      #3  
    Unread 06-15-2013, 08:52 PM
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    Join Date: Feb 2011
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    Re: .300wm confusion

    Quote:
    Originally Posted by jasent View Post
    Could it be that for the first group your ammo was warmer/colder than ambient temp from the car.then when you shot the second group it had cooled or warmed up to ambient. This could make it change speed and take you out of your node
    No, I had been shooting my .308 for about a half an hr before this, so should not have been and issue.
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      #4  
    Unread 06-15-2013, 11:10 PM
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    Join Date: Nov 2010
    Location: deer park, wa 99006
    Posts: 152
    Re: .300wm confusion

    Did they all chrono the same?
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      #5  
    Unread 06-16-2013, 05:56 AM
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    Join Date: Jun 2008
    Location: Texas
    Posts: 416
    Re: .300wm confusion

    Could be your stock may be touching the barrel and causing the group to open up.When you switched to a different target,the front rest may have been in a different spot and the stock wasn't touching the barrel.
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      #6  
    Unread 06-16-2013, 07:15 AM
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    Join Date: Apr 2012
    Location: Terre Haute In.
    Posts: 693
    Re: .300wm confusion

    Was the barrel warm, or cold when you first found your node? Since it sounds as though it was warm when you shot the second group.
    __________________
    Rick

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      #7  
    Unread 06-17-2013, 06:18 PM
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    Join Date: Feb 2011
    Posts: 225
    Re: .300wm confusion

    Quote:
    Originally Posted by jasent View Post
    Did they all chrono the same?
    Yes, They all chronoed the same. It could have been the stock flexing, but have not had that problem before.

    TKS
    JPB
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