300 ultra mag

Discussion in 'Reloading' started by ACKLEY LOVER, Feb 7, 2013.

  1. ACKLEY LOVER

    ACKLEY LOVER New Member

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    Feb 7, 2013
    Looking for a load for a 300 ultra mag 200gr.nosler accubonds using us869.would love any info i can get. Thanks guys.
     
  2. clambdin

    clambdin Well-Known Member

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    Jan 20, 2005
    Cant help you with US869 but I'm running 95grs Retumbo with a 200gr Accubond 3100fps....94-95 grs seems to be the spot !
     

  3. knc1105

    knc1105 Well-Known Member

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    Feb 22, 2010
    I got both my favorite loads here, 300 RUM 94 grs Retumbo with Boran Nitride coated 200 gr. Accubond 3213fps out of a Rem. 700 Police, Nosler Custom brass wit uniformed flash hole, Lee factory crimped. The 338 RUM load I got from JD338 here and it's Retumbo and a 250 gr. Accubond Boran Coated at 3160fps out of a Lilgi 28" #5 profile barrel.
     
  4. freebird63

    freebird63 Well-Known Member

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    Dec 20, 2009
    When I had my 300RUM I tried US869 and hated it, way too temp sensitive. Retumbo is the powder I used. Some are having good luck with Ramshot Magnum powder.
     
  5. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    May 13, 2012
    I'm shooting 104 gr of wc 872 with the 190 hornady in my 300 rum in rem brass with a 215. I'd back off 10% and go from there as 869 and 872 are very close. You will probably be around 5% down from the top charge.