105 gr 6mm bullet in a 243 casing

Discussion in 'Ammunition & Reloading' started by Marlinman, Oct 17, 2011.

  1. Marlinman

    Marlinman New Member

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    Has anyone tried this? They miked out the same. Im shooting a mossberg 800b. They are loaded to federal power shok specs. I have 5 loaded right now. They chamber good. I have always heard that except for the brass the 6mm will shoot through a 243 w/o any problems, is this true? Any and all thoughts are appreciated.
     
  2. Marlinman

    Marlinman New Member

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    Last edited: Oct 26, 2011

  3. JTJ

    JTJ Well-Known Member Supporter

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    The .243 is a 6mm. If the bullet mics properly then you can shoot it with the proper load.
     
  4. Boyerracing343

    Boyerracing343 New Member Supporter

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    Both of my loading manuals (Hornady and Speer) state 6mm and 243 winchester use a .243 diameter bullet.
     
  5. robocop10mm

    robocop10mm Lifetime Supporting Member Lifetime Supporter

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    They use the same bullet. A 105 is about the heaviest you can put through either. I generally load a 100 in the .243.
     
  6. Marlinman

    Marlinman New Member

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    That wat my book says also but i want to make sure b4 i shoot them. I also found at the yard sale i got the 105s at some 115 grain hornady hp 6 mm bullets unloaded
     
  7. BlueTurf

    BlueTurf New Member

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    I shot the Speer 105-grain SP in my Remington 788 .243 for many years with no problems. They actually grouped very well. Load data for the 105-grain bullet is listed in the Speer manual. Hornady also list data for their 105-grain A-Max for .243.
     
  8. Marlinman

    Marlinman New Member

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    Im going 2 use them for deer this year. Thanks for the info guys, now back 2 making test loads
     
  9. Marlinman

    Marlinman New Member

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    My next question is how will the 1 in 10 riflings handle the longer bullets of the 6 mm?
     
  10. BlueTurf

    BlueTurf New Member

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    Marlinman, that is an interesting question. Hornady recommends that their 105-grain matchy bullets only be shot through match barrels that can provide proper stability for accuracy. Their 105-grain bullet is pretty long.
     
  11. Marlinman

    Marlinman New Member

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    It seems to handle the seirras pretty well but im still just usen my test rounds.