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OAL for Sierra 69 gr HPBT MK

Discussion in 'Handloading and Reloading' started by CJK8, Aug 25, 2011.

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  1. CJK8

    CJK8 Member

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    Sierra's manual lists COAL as 2.260". Hodgdon's Website data shows 2.235". Why the diferrence? Thanks.
     
  2. JDGray

    JDGray Member

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    Thats just where Hodgdons tested their load, or could be the min oal for a max load. Your rifle will tell you the oal it likes when you try different seating depths. Load safe!:)
     
  3. cfullgraf

    cfullgraf Member

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    2.260" is about max length to fit in an AR-15 Magazine.

    I agree with JDGRay.
     
  4. 1stmarine

    1stmarine Member

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    See the max lengh of the chamber and backout 0.010/20.
    See if the max length of your magazine allows otherwise use as much as you can.
    Try different lenghts and stick with the best results.
    save a dummy with the winning round so next time you can quickly set up
    your dies to clone that winner.
    Cheers.
    E.
     
  5. JDGray

    JDGray Member

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    I have a 22-250, loaded with 55gr Nosler Balistic tips, book says 2.350", mine are set at 2.500" ;) Just to show you how far off a book can be from what shoots best in your gun.
     
  6. Peakbagger46

    Peakbagger46 Member

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    I load the 69g matchkings to 2.300" for my Savage bolt gun. The result is around .5 MOA for three shot groups... I am going to play with the OAL some more though to see if I can make it better.
     
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