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Little bit of 300 grain Berger results

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  #1  
Unread 05-30-2010, 09:38 PM
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Little bit of 300 grain Berger results

The data!

338 Lapua Improved. 32" barrel. 104 grains Retumbo. 300 grain Berger bullet. Cases have been fired several times. The velocity spread was around 10 fps.







Unfortunately, accuracy wasn't that great. Mirage was horrible, it's been well into the 90's. At 425 yards, I shot several groups, I would have two almost touching and others a bit away. I'll attribute this to mirage, the bull was dancing around quite a lot.
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  •   #2  
    Unread 05-30-2010, 09:41 PM
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    Re: Little bit of 300 grain Berger results

    Accuracy was still under MOA though, forgot that!
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      #3  
    Unread 05-30-2010, 10:40 PM
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    Re: Little bit of 300 grain Berger results

    thanks for sharing and keep it comming.
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      #4  
    Unread 05-31-2010, 10:44 PM
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    Re: Little bit of 300 grain Berger results

    How hot of a load is that in your gun? I'm torn between a 338 Lapua Imp and 338 Norma Imp to match with the new Bergers. I'd like to also use Retumbo and the 3066 is just what I'm looking for.
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      #5  
    Unread 06-01-2010, 06:52 AM
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    Re: Little bit of 300 grain Berger results

    Thanks for sharing the results. I hope to have my 338 lapua finished in the near future and want to give the Bergers a try.
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      #6  
    Unread 06-01-2010, 12:40 PM
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    Re: Little bit of 300 grain Berger results

    At 104 grains you can just see the ejector mark on the brass. Bolt lift is heavy, but every single load I try gives heavy bolt lift, I think it's from the cerakote on the bolt. The primer however, looks perfect!

    Part of my velocity may be the 5C rifling from my Broughton barrel, I hear it gives a little speed boost.
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      #7  
    Unread 06-01-2010, 01:46 PM
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    Re: Little bit of 300 grain Berger results

    Quote:
    Originally Posted by Tyler Kemp View Post
    At 104 grains you can just see the ejector mark on the brass. Bolt lift is heavy, but every single load I try gives heavy bolt lift, I think it's from the cerakote on the bolt. The primer however, looks perfect!

    Part of my velocity may be the 5C rifling from my Broughton barrel, I hear it gives a little speed boost.

    My bolt is the same way, also sprayed with cerakote. Is there anyway you could send me your drop info? I'd like to see how accurate the free ballistics program I've been using is.
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