69 grain heads

Discussion in 'The Powder Keg' started by M1rifleman, Jul 12, 2002.

  1. M1rifleman

    M1rifleman Guest

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    i was wondering if IMR 3031 can be used with sierra 69 grain BTMH head.....if so how many grains of powder?
     
  2. M1rifleman

    M1rifleman Guest

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  3. carl

    carl Guest

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    best i have founds so far is from an older sierra manual for 69 gr bthp match i use 26.2 gr of 748. this is giving me between 2900 and 3000 fps in a 24 in ar. i would suggest you reduce this to 26.0 gr as it is right about max pressure and starts to show signs of it in military brass.