ar-15

Discussion in 'Reloading' started by yoda, Mar 16, 2010.

  1. yoda

    yoda Well-Known Member

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    Nov 27, 2007
    i have a ar and want to shoot a 90 gr bullet out of it can i put these in the mag or do i have to shoot it as a single shot
     
  2. alaska

    alaska Well-Known Member

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    Feb 1, 2010
    Single shot mode for the 90gr.

    I shoot the 69 Sierra MK and Reloader 15 in my ARgun)
     

  3. Kevin Thomas

    Kevin Thomas Well-Known Member

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    Feb 16, 2009
    Yoda,

    strictly a single shot propostion there, and that goes for the 80-82 grain bullets as well. These were both designed for the 600 yard stage of National Match type shooting. This is all done slow-fire, single loading the rifle with one round at a time. As a result, the OAL was irrelevant and allowed the makers to get away with the added length in the interest of vastly improved performance.

    If you want to run the rounds through the magazine in semi-auto mode, you'll need to go with something like the various 69-77 grain offereings that use a somewhat blunter (roughly a 7 caliber) ogive.

    Hope this helps,

    Kevin Thomas
    Lapua USA
     
  4. RT2506

    RT2506 Well-Known Member

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    Jan 10, 2008
    You will also have to have a 7 inch twist for those 90 gr bullets. 8 twist will work for the 77 to 80 gr (single shot). I shoot the 69 Sierra with Varget through the magazine in a 9 twist that is really accurate.