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.300wm confusion

 
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  #1  
Old 06-14-2013, 10:03 AM
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Join Date: Feb 2011
Posts: 212
.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  
Old 06-15-2013, 10:13 AM
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Join Date: Nov 2010
Location: deer park, wa 99006
Posts: 123
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  
Old 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  
Old 06-15-2013, 11:10 PM
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Join Date: Nov 2010
Location: deer park, wa 99006
Posts: 123
Re: .300wm confusion

Did they all chrono the same?
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  #5  
Old 06-16-2013, 05:56 AM
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Join Date: Jun 2008
Location: Texas
Posts: 347
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  
Old 06-16-2013, 07:15 AM
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Join Date: Apr 2012
Location: Terre Haute In.
Posts: 695
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  
Old 06-17-2013, 06:18 PM
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Join Date: Feb 2011
Posts: 212
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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